diff --git a/frontend/src/views/machine/device/components/monitorTab.vue b/frontend/src/views/machine/device/components/monitorTab.vue
index 9afc43e..63138d0 100644
--- a/frontend/src/views/machine/device/components/monitorTab.vue
+++ b/frontend/src/views/machine/device/components/monitorTab.vue
@@ -162,6 +162,18 @@ const openDialog = (titleType: string, row: Partial<Monitor.ResPqMon> = {}) => {
         })
         return
     }
+    // 新增时检查线路号是否全部被占用
+    if (titleType === 'add') {
+        if(props.DevFormContent.devChns == tableData.value.length){
+            ElMessageBox.confirm(`线路号已全部被占用，无法新增监测点`, '提示', {
+                confirmButtonText: '确定',
+                cancelButtonText: '取消',
+                type: 'warning'
+            })
+            return
+        }
+
+    }
     title_Type.value = titleType
     monitorPopup.value?.open(titleType, row, props.DevFormContent, tableData.value, props.selectOptions)
 }