diff --git a/frontend/src/views/tools/waveform/components/WaveformToolbar.vue b/frontend/src/views/tools/waveform/components/WaveformToolbar.vue
index 8c8f3ca..85e8203 100644
--- a/frontend/src/views/tools/waveform/components/WaveformToolbar.vue
+++ b/frontend/src/views/tools/waveform/components/WaveformToolbar.vue
@@ -1,6 +1,5 @@
-<template>
+<template>
     <div class="page-header">
-
         <div class="action-row">
             <div class="file-select-row">
                 <el-input
@@ -31,7 +30,12 @@
                         placeholder="选择通道"
                         @update:model-value="handleChannelChange"
                     >
-                        <el-option v-for="item in channelOptions" :key="item.value" :label="item.label" :value="item.value" />
+                        <el-option
+                            v-for="item in channelOptions"
+                            :key="item.value"
+                            :label="item.label"
+                            :value="item.value"
+                        />
                     </el-select>
                 </div>
 
@@ -54,7 +58,11 @@
 
                 <div class="toolbar-item">
                     <div class="toolbar-label">数值类型</div>
-                    <el-radio-group :model-value="activeValueMode" class="value-mode-switch" @update:model-value="handleValueModeChange">
+                    <el-radio-group
+                        :model-value="activeValueMode"
+                        class="value-mode-switch"
+                        @update:model-value="handleValueModeChange"
+                    >
                         <el-radio-button v-for="item in valueModeOptions" :key="item.value" :label="item.value">
                             {{ item.label }}
                         </el-radio-button>
@@ -72,14 +80,14 @@
 <script setup lang="ts">
 import { Download, FolderOpened } from '@element-plus/icons-vue'
 import { ref } from 'vue'
-import type { DisplayMode, LabelValueOption, ValueMode, WaveformDetailOption } from './types'
+import type { ChannelSelectValue, DisplayMode, LabelValueOption, ValueMode, WaveformDetailOption } from './types'
 
 defineProps<{
     selectedWaveformFileName: string
     isParsing: boolean
     waveformFileAccept: string
     channelOptions: WaveformDetailOption[]
-    activeChannelIndex: number
+    activeChannelIndex: ChannelSelectValue
     displayModeOptions: LabelValueOption<DisplayMode>[]
     activeDisplayMode: DisplayMode
     valueModeOptions: LabelValueOption<ValueMode>[]
@@ -88,7 +96,7 @@ defineProps<{
 }>()
 
 const emit = defineEmits<{
-    'update:activeChannelIndex': [value: number]
+    'update:activeChannelIndex': [value: ChannelSelectValue]
     'update:activeDisplayMode': [value: DisplayMode]
     'update:activeValueMode': [value: ValueMode]
     'waveform-file-change': [event: Event]
@@ -108,7 +116,7 @@ const handleWaveformFileChange = (event: Event) => {
     emit('waveform-file-change', event)
 }
 
-const handleChannelChange = (value: number) => {
+const handleChannelChange = (value: ChannelSelectValue) => {
     emit('update:activeChannelIndex', value)
 }
 
@@ -202,6 +210,4 @@ const handleValueModeChange = (value: string | number | boolean | undefined) =>
         max-width: none;
     }
 }
-
 </style>
-
diff --git a/frontend/src/views/tools/waveform/components/WaveformTrendPanel.vue b/frontend/src/views/tools/waveform/components/WaveformTrendPanel.vue
index b2440d7..9cd2ccc 100644
--- a/frontend/src/views/tools/waveform/components/WaveformTrendPanel.vue
+++ b/frontend/src/views/tools/waveform/components/WaveformTrendPanel.vue
@@ -1,4 +1,4 @@
-<template>
+<template>
     <section class="waveform-panel">
         <div class="panel-header">
             <el-tabs :model-value="activeTrendTab" class="trend-tabs" @update:model-value="handleTrendTabChange">
@@ -7,7 +7,26 @@
         </div>
 
         <div class="panel-body">
-            <div v-if="hasWaveformData && activeDisplayMode === 'multi-channel'" class="chart-container">
+            <div v-if="hasWaveformData && isAllChannelsActive" class="all-channel-list">
+                <template v-for="group in allChannelTrendGroups" :key="group.key">
+                    <div v-if="activeDisplayMode === 'multi-channel'" class="all-channel-chart">
+                        <LineChart :options="group.multiChannelOptions" />
+                    </div>
+                    <template v-else>
+                        <div
+                            v-for="item in group.singleChannelOptionsList"
+                            :key="item.key"
+                            class="single-channel-card"
+                            :class="{ 'single-channel-card--with-axis': item.isLastChart }"
+                        >
+                            <div class="single-channel-chart">
+                                <LineChart :options="item.options" :group="item.group" />
+                            </div>
+                        </div>
+                    </template>
+                </template>
+            </div>
+            <div v-else-if="hasWaveformData && activeDisplayMode === 'multi-channel'" class="chart-container">
                 <LineChart :options="activeTrendOptions" />
             </div>
             <div v-else-if="hasWaveformData" class="single-channel-list">
@@ -25,7 +44,9 @@
             <div v-else class="empty-block">
                 <div class="empty-title">暂无波形数据</div>
                 <div class="empty-text">请选择同一组 `.cfg` 和 `.dat` 文件后自动解析并展示。</div>
-                <div v-if="lastParseErrorMessage" class="empty-text error-text">最近一次解析失败：{{ lastParseErrorMessage }}</div>
+                <div v-if="lastParseErrorMessage" class="empty-text error-text">
+                    最近一次解析失败：{{ lastParseErrorMessage }}
+                </div>
             </div>
         </div>
     </section>
@@ -33,15 +54,23 @@
 
 <script setup lang="ts">
 import LineChart from '@/components/echarts/line/index.vue'
-import type { DisplayMode, LabelValueOption, SingleChannelTrendOption, TrendTabValue } from './types'
+import type {
+    AllChannelTrendGroup,
+    DisplayMode,
+    LabelValueOption,
+    SingleChannelTrendOption,
+    TrendTabValue
+} from './types'
 
 defineProps<{
     hasWaveformData: boolean
+    isAllChannelsActive: boolean
     activeDisplayMode: DisplayMode
     activeTrendTab: TrendTabValue
     trendTabs: LabelValueOption<TrendTabValue>[]
     activeTrendOptions: Record<string, unknown>
     singleChannelTrendOptionsList: SingleChannelTrendOption[]
+    allChannelTrendGroups: AllChannelTrendGroup[]
     lastParseErrorMessage: string
 }>()
 
@@ -125,6 +154,26 @@ const handleTrendTabChange = (value: string | number) => {
     overflow: hidden;
 }
 
+.all-channel-list {
+    display: flex;
+    flex: 1;
+    flex-direction: column;
+    gap: 4px;
+    min-height: 0;
+    padding: 8px;
+    overflow: hidden;
+    border: 1px solid var(--el-border-color-lighter);
+    border-radius: 4px;
+    background: var(--cn-color-canvas-bg);
+}
+
+.all-channel-chart {
+    display: flex;
+    flex: 1;
+    min-height: 0;
+    overflow: hidden;
+}
+
 .single-channel-card {
     display: flex;
     flex: 1;
diff --git a/frontend/src/views/tools/waveform/components/types.ts b/frontend/src/views/tools/waveform/components/types.ts
index 2b26f8f..6ca2bec 100644
--- a/frontend/src/views/tools/waveform/components/types.ts
+++ b/frontend/src/views/tools/waveform/components/types.ts
@@ -1,6 +1,7 @@
-export type TrendTabValue = 'instant' | 'rms'
+export type TrendTabValue = 'instant' | 'rms'
 export type ValueMode = 'primary' | 'secondary'
 export type DisplayMode = 'single-channel' | 'multi-channel'
+export type ChannelSelectValue = number | 'all'
 
 export interface LabelValueOption<T extends string | number = string | number> {
     label: string
@@ -9,7 +10,7 @@ export interface LabelValueOption<T extends string | number = string | number> {
 
 export interface WaveformDetailOption {
     label: string
-    value: number
+    value: ChannelSelectValue
 }
 
 export interface SingleChannelTrendOption {
@@ -19,6 +20,13 @@ export interface SingleChannelTrendOption {
     options: Record<string, unknown>
 }
 
+export interface AllChannelTrendGroup {
+    key: string
+    title: string
+    singleChannelOptionsList: SingleChannelTrendOption[]
+    multiChannelOptions: Record<string, unknown>
+}
+
 export interface SummaryItem {
     label: string
     value: string | number
diff --git a/frontend/src/views/tools/waveform/index.vue b/frontend/src/views/tools/waveform/index.vue
index b9c7d6a..eb4b091 100644
--- a/frontend/src/views/tools/waveform/index.vue
+++ b/frontend/src/views/tools/waveform/index.vue
@@ -1,4 +1,4 @@
-<template>
+<template>
     <div class="table-box waveform-page">
         <WaveformToolbar
             :selected-waveform-file-name="selectedWaveformFileName"
@@ -26,6 +26,8 @@
                 :trend-tabs="trendTabs"
                 :active-trend-options="activeTrendOptions"
                 :single-channel-trend-options-list="singleChannelTrendOptionsList"
+                :all-channel-trend-groups="allChannelTrendGroups"
+                :is-all-channels-active="isAllChannelsActive"
                 :last-parse-error-message="lastParseErrorMessage"
                 @update:active-trend-tab="activeTrendTab = $event"
             />
@@ -52,6 +54,8 @@ import WaveformInfoPanel from './components/WaveformInfoPanel.vue'
 import WaveformToolbar from './components/WaveformToolbar.vue'
 import WaveformTrendPanel from './components/WaveformTrendPanel.vue'
 import type {
+    AllChannelTrendGroup,
+    ChannelSelectValue,
     DisplayMode,
     LabelValueOption,
     SingleChannelTrendOption,
@@ -80,13 +84,15 @@ interface WaveformTrendPayload {
 
 interface TrendChartLayoutOptions {
     showTimeAxis?: boolean
+    showLegend?: boolean
 }
 
 const activeTrendTab = ref<TrendTabValue>('instant')
 const activeValueMode = ref<ValueMode>('primary')
 const activeDisplayMode = ref<DisplayMode>('single-channel')
-const activeChannelIndex = ref(0)
+const activeChannelIndex = ref<ChannelSelectValue>('all')
 const singleChannelTrendChartGroup = 'waveform-single-channel-sync'
+const allChannelTrendChartGroup = 'waveform-all-channel-sync'
 const isParsing = ref(false)
 const selectedCfgFile = ref<File | null>(null)
 const selectedDatFile = ref<File | null>(null)
@@ -205,13 +211,19 @@ const normalizedWaveDetails = computed<Waveform.WaveDataDetail[]>(() => {
 })
 
 const channelOptions = computed<WaveformDetailOption[]>(() => {
-    return normalizedWaveDetails.value.map((item, index) => ({
+    const detailOptions = normalizedWaveDetails.value.map((item, index) => ({
         label: buildChannelLabel(item, index),
         value: index
     }))
+
+    return detailOptions.length ? [{ label: '全部', value: 'all' }, ...detailOptions] : []
 })
 
+const isAllChannelsActive = computed(() => activeChannelIndex.value === 'all')
+
 const activeWaveDetail = computed(() => {
+    if (typeof activeChannelIndex.value !== 'number') return null
+
     return normalizedWaveDetails.value[activeChannelIndex.value] || normalizedWaveDetails.value[0] || null
 })
 
@@ -226,13 +238,15 @@ const isCurrentChannel = (channelName?: string) => {
     return (channelName || '').toUpperCase().startsWith('I')
 }
 
-const activeValueScale = computed(() => {
+const getValueScale = (detail: Waveform.WaveDataDetail | null) => {
     if (activeValueMode.value === 'secondary') return 1
 
     const waveData = activeWaveData.value
-    const ratio = isCurrentChannel(activeWaveDetail.value?.channelName) ? waveData?.ct : waveData?.pt
+    const ratio = isCurrentChannel(detail?.channelName) ? waveData?.ct : waveData?.pt
     return normalizeRatio(ratio)
-})
+}
+
+const activeValueScale = computed(() => getValueScale(activeWaveDetail.value))
 
 const safeNumber = (value: unknown) => {
     const numberValue = Number(value)
@@ -262,7 +276,11 @@ const buildChannelLabel = (detail: Waveform.WaveDataDetail, index: number) => {
     return `通道 ${index + 1}`
 }
 
-const buildTrendPayload = (detail: Waveform.WaveDataDetail | null, trendTab: TrendTabValue, scale: number): WaveformTrendPayload => {
+const buildTrendPayload = (
+    detail: Waveform.WaveDataDetail | null,
+    trendTab: TrendTabValue,
+    scale: number
+): WaveformTrendPayload => {
     const trendData = trendTab === 'instant' ? detail?.instantData : detail?.rmsData
     const aName = detail?.a || 'A相'
     const bName = detail?.b || 'B相'
@@ -301,12 +319,18 @@ const activeTrendPayload = computed(() => {
     return buildTrendPayload(activeWaveDetail.value, activeTrendTab.value, activeValueScale.value)
 })
 
-const currentTrendColors = computed(() => {
-    const customColors = activeWaveDetail.value?.colors?.filter(Boolean) || []
+const getTrendColors = (detail: Waveform.WaveDataDetail | null) => {
+    const customColors = detail?.colors?.filter(Boolean) || []
     return customColors.length >= 3 ? customColors.slice(0, 3) : defaultPhaseColors
-})
+}
 
-const hasWaveformData = computed(() => activeTrendPayload.value.series.length > 0)
+const currentTrendColors = computed(() => getTrendColors(activeWaveDetail.value))
+
+const hasWaveformData = computed(() => {
+    if (isAllChannelsActive.value) return allChannelTrendGroups.value.length > 0
+
+    return activeTrendPayload.value.series.length > 0
+})
 
 const SYMMETRIC_AXIS_SPLIT_COUNT = 6
 const REGULAR_AXIS_SPLIT_COUNT = 5
@@ -408,13 +432,40 @@ const buildTimeAxisLabelFormatter = (timeLabels: string[]) => {
     }
 }
 
+interface TrendTooltipParam {
+    axisValue?: string | number
+    marker?: string
+    seriesName?: string
+    value?: number | string
+}
+
+const buildTrendTooltipFormatter = (unit: string) => {
+    return (params: TrendTooltipParam | TrendTooltipParam[]) => {
+        const paramList = Array.isArray(params) ? params : [params]
+        const firstParam = paramList[0]
+        const timeValue = firstParam?.axisValue
+        const valueRows = paramList
+            .map(item => {
+                const marker = item.marker || ''
+                const seriesName = item.seriesName || ''
+                const valueText = unit ? `${formatNumber(item.value)} ${unit}` : formatNumber(item.value)
+
+                return `<div>${marker}${seriesName}<span style="float:right;margin-left:12px;font-weight:600;">${valueText}</span></div>`
+            })
+            .join('')
+        const timeText = timeValue === undefined ? '--' : `${formatNumber(timeValue, 2)} ms`
+
+        return `${valueRows}<div style="margin-top:4px;">时间<span style="float:right;margin-left:12px;">${timeText}</span></div>`
+    }
+}
+
 const buildTrendChartOptions = (
     trendPayload: WaveformTrendPayload,
     seriesList: WaveformSeriesItem[],
     chartColors = currentTrendColors.value,
     layoutOptions: TrendChartLayoutOptions = {}
 ) => {
-    const { showTimeAxis = true } = layoutOptions
+    const { showTimeAxis = true, showLegend = true } = layoutOptions
 
     return {
         tooltip: {
@@ -427,16 +478,15 @@ const buildTrendChartOptions = (
                     width: 1
                 }
             },
-            valueFormatter: (value: number) => {
-                return trendPayload.unit ? `${formatNumber(value)} ${trendPayload.unit}` : formatNumber(value)
-            }
+            formatter: buildTrendTooltipFormatter(trendPayload.unit)
         },
         legend: {
+            show: showLegend,
             top: 0,
             right: 12
         },
         grid: {
-            top: '18px',
+            top: showLegend ? '18px' : '6px',
             left: '24px',
             right: showTimeAxis ? '32px' : '24px',
             bottom: showTimeAxis ? '16px' : '6px'
@@ -493,24 +543,68 @@ const activeTrendOptions = computed<Record<string, unknown>>(() => {
 })
 
 // 单通道模式按相别拆成多个图，便于分别观察各通道波形。
-const singleChannelTrendOptionsList = computed<SingleChannelTrendOption[]>(() => {
-    const trendPayload = activeTrendPayload.value
+const buildSingleChannelTrendOptionsList = (
+    detail: Waveform.WaveDataDetail | null,
+    detailIndex: number,
+    chartGroup: string,
+    resolveShowTimeAxis = (seriesIndex: number, seriesCount: number) => seriesIndex === seriesCount - 1
+): SingleChannelTrendOption[] => {
+    const trendPayload = buildTrendPayload(detail, activeTrendTab.value, getValueScale(detail))
+    const trendColors = getTrendColors(detail)
 
     // 单通道下每张图只保留一个 series，需要单独指定对应相色。
-    return trendPayload.series.map((item, index) => ({
-        key: item.name,
-        group: singleChannelTrendChartGroup,
-        isLastChart: index === trendPayload.series.length - 1,
-        options: buildTrendChartOptions(
-            trendPayload,
-            [item],
-            [currentTrendColors.value[index] || defaultPhaseColors[index]],
-            {
-                // 仅最后一张图显示时间轴，并通过卡片高度微调补偿其额外占用空间。
-                showTimeAxis: index === trendPayload.series.length - 1
+    return trendPayload.series.map((item, index) => {
+        const showTimeAxis = resolveShowTimeAxis(index, trendPayload.series.length)
+
+        return {
+            key: `${detailIndex}-${item.name}`,
+            group: chartGroup,
+            isLastChart: showTimeAxis,
+            options: buildTrendChartOptions(trendPayload, [item], [trendColors[index] || defaultPhaseColors[index]], {
+                // 单通道下每张图只有一条曲线，图例信息与图表标题重复。
+                showTimeAxis,
+                showLegend: false
+            })
+        }
+    })
+}
+
+const singleChannelTrendOptionsList = computed<SingleChannelTrendOption[]>(() => {
+    return buildSingleChannelTrendOptionsList(activeWaveDetail.value, -1, singleChannelTrendChartGroup)
+})
+
+const allChannelTrendGroups = computed<AllChannelTrendGroup[]>(() => {
+    const availableDetails = normalizedWaveDetails.value
+        .map((detail, index) => {
+            const trendPayload = buildTrendPayload(detail, activeTrendTab.value, getValueScale(detail))
+
+            return {
+                detail,
+                index,
+                trendPayload
             }
-        )
-    }))
+        })
+        .filter(item => item.trendPayload.series.length > 0)
+
+    return availableDetails.map((item, groupIndex) => {
+        const isLastGroup = groupIndex === availableDetails.length - 1
+
+        return {
+            key: `${item.index}-${buildChannelLabel(item.detail, item.index)}`,
+            title: buildChannelLabel(item.detail, item.index),
+            singleChannelOptionsList: buildSingleChannelTrendOptionsList(
+                item.detail,
+                item.index,
+                allChannelTrendChartGroup,
+                (seriesIndex, seriesCount) => isLastGroup && seriesIndex === seriesCount - 1
+            ),
+            multiChannelOptions: buildTrendChartOptions(
+                item.trendPayload,
+                item.trendPayload.series,
+                getTrendColors(item.detail)
+            )
+        }
+    })
 })
 
 const summaryItems = computed<SummaryItem[]>(() => {
@@ -523,7 +617,14 @@ const summaryItems = computed<SummaryItem[]>(() => {
         { label: '触发时间', value: formatWaveformTime(cfgData?.timeTrige) },
         { label: '采样率', value: cfgData?.finalSampleRate ? `${cfgData.finalSampleRate} Hz` : '--' },
         { label: '总通道数', value: cfgData?.nChannelNum ?? '--' },
-        { label: '当前通道', value: detail ? buildChannelLabel(detail, activeChannelIndex.value) : '--' },
+        {
+            label: '当前通道',
+            value: isAllChannelsActive.value
+                ? '全部'
+                : detail
+                  ? buildChannelLabel(detail, activeChannelIndex.value as number)
+                  : '--'
+        },
         { label: '单位', value: detail?.unit || '--' },
         { label: '相别数量', value: waveData?.iPhasic ?? '--' },
         { label: 'PT / CT', value: `${formatNumber(waveData?.pt, 2)} / ${formatNumber(waveData?.ct, 2)}` },
@@ -583,7 +684,7 @@ const handleWaveformFileChange = async (event: Event) => {
 const loadWaveformData = async (cfgFile: File, datFile: File) => {
     try {
         isParsing.value = true
-        activeChannelIndex.value = 0
+        activeChannelIndex.value = 'all'
         lastParseErrorMessage.value = ''
         lastVectorParseErrorMessage.value = ''
 
@@ -641,16 +742,46 @@ const downloadTrendData = () => {
     }
 
     const trendPayload = activeTrendPayload.value
+    const allChannelPayloads = normalizedWaveDetails.value
+        .map((detail, index) => ({
+            label: buildChannelLabel(detail, index),
+            payload: buildTrendPayload(detail, activeTrendTab.value, getValueScale(detail))
+        }))
+        .filter(item => item.payload.series.length > 0)
+    const exportPayload = isAllChannelsActive.value ? allChannelPayloads[0]?.payload : trendPayload
+
+    if (!exportPayload) {
+        ElMessage.warning('暂无可导出的波形数据')
+        return
+    }
+
     const header = ['时间', ...trendPayload.series.map(item => item.name)]
-    const rows = trendPayload.timeLabels.map((time, index) => {
+    const allChannelHeader = [
+        '时间',
+        ...allChannelPayloads.flatMap(item => item.payload.series.map(series => `${item.label}-${series.name}`))
+    ]
+    const rows = exportPayload.timeLabels.map((time, index) => {
+        if (isAllChannelsActive.value) {
+            return [
+                time,
+                ...allChannelPayloads.flatMap(item => item.payload.series.map(series => series.data[index] ?? ''))
+            ]
+        }
+
         return [time, ...trendPayload.series.map(item => item.data[index] ?? '')]
     })
 
-    const csvContent = [header, ...rows].map(row => row.join(',')).join('\n')
+    const csvContent = [isAllChannelsActive.value ? allChannelHeader : header, ...rows]
+        .map(row => row.join(','))
+        .join('\n')
     const blob = new Blob([`\uFEFF${csvContent}`], { type: 'text/csv;charset=utf-8;' })
     const blobUrl = URL.createObjectURL(blob)
     const exportFile = document.createElement('a')
-    const channelLabel = activeWaveDetail.value ? buildChannelLabel(activeWaveDetail.value, activeChannelIndex.value) : '波形'
+    const channelLabel = isAllChannelsActive.value
+        ? '全部'
+        : activeWaveDetail.value
+          ? buildChannelLabel(activeWaveDetail.value, activeChannelIndex.value as number)
+          : '波形'
     const fileName = `波形查看_${channelLabel}_${valueModeLabelMap[activeValueMode.value]}_${trendLabelMap[activeTrendTab.value]}.csv`
 
     exportFile.style.display = 'none'
@@ -686,4 +817,3 @@ const downloadTrendData = () => {
     }
 }
 </style>
-