diff --git a/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebServiceManager.java b/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebServiceManager.java
index 6880f680..2ea7a0d8 100644
--- a/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebServiceManager.java
+++ b/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebServiceManager.java
@@ -87,6 +87,16 @@ public class WebServiceManager {
         return userSessions.remove(userId);
     }
 
+    /**
+     * 仅当当前会话仍绑定到指定通道时才移除，避免旧连接误删新连接映射。
+     */
+    public static boolean removeByUserId(String userId, Channel channel) {
+        if (userId == null || channel == null) {
+            return false;
+        }
+        return userSessions.remove(userId, channel);
+    }
+
     /**
      * 根据channelId移除会话（兼容老版本）
      * 时间复杂度：O(n)，建议使用removeByUserId替代
diff --git a/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebSocketHandler.java b/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebSocketHandler.java
index ff472c39..2f968d89 100644
--- a/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebSocketHandler.java
+++ b/detection/src/main/java/com/njcn/gather/detection/util/socket/websocket/WebSocketHandler.java
@@ -111,7 +111,7 @@ public class WebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketF
     public void handlerRemoved(ChannelHandlerContext ctx) {
         log.info("webSocket客户端退出，channelId: {}, userId: {}", ctx.channel().id(), this.userId);
         if (this.userId != null) {
-            WebServiceManager.removeByUserId(this.userId);
+            WebServiceManager.removeByUserId(this.userId, ctx.channel());
         } else {
             // 备用方案：如果userId为空，使用传统方法
             WebServiceManager.removeChannel(ctx.channel().id().toString());
@@ -168,7 +168,7 @@ public class WebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketF
                         log.error("客户端心跳检测空闲次数超过{}次，关闭连接，channelId: {}, userId: {}", MAX_HEARTBEAT_MISS_COUNT, ctx.channel().id(), this.userId);
                         ctx.channel().close();
                         if (this.userId != null) {
-                            WebServiceManager.removeByUserId(this.userId);
+                            WebServiceManager.removeByUserId(this.userId, ctx.channel());
                         } else {
                             WebServiceManager.removeChannel(ctx.channel().id().toString());
                         }
@@ -326,7 +326,7 @@ public class WebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketF
 
         // 清理会话
         if (this.userId != null) {
-            WebServiceManager.removeByUserId(this.userId);
+            WebServiceManager.removeByUserId(this.userId, ctx.channel());
             log.debug("已清理WebSocket会话，userId: {}, channelId: {}", this.userId, channelId);
         } else {
             WebServiceManager.removeChannel(channelId);
@@ -427,4 +427,4 @@ public class WebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketF
     }
 
     // ================================ URL解析工具已移至WebSocketPreprocessor ================================
-}
\ No newline at end of file
+}