diff --git a/handler/tool.go b/handler/tool.go
index 52ba04f..7522064 100644
--- a/handler/tool.go
+++ b/handler/tool.go
@@ -242,6 +242,10 @@ func subscribeAndHandleMessagesV3(ws *websocket.Conn, device_id int) {
 					break
 				}
 				c = count
+				err5 := img.Close()
+				if err5 != nil {
+					log.Printf("img close err:%v", err)
+				}
 			}
 		} else {
 			//每秒发送一次心跳检测