diff --git a/service/tool.go b/service/tool.go
index c9971cf..e8fbfcc 100644
--- a/service/tool.go
+++ b/service/tool.go
@@ -28,6 +28,17 @@ func SetDeviceCurrentFrame(frame gocv.Mat, device_id int) error {
 	mutex := mutex_.(*sync.RWMutex)
 	mutex.Lock()
 	defer mutex.Unlock()
+	//获取前一帧，将前一帧释放
+	framePrev, ok := DeviceCurrentFrameMap.Load(device_id)
+	if ok {
+		frame_, ok2 := framePrev.(gocv.Mat)
+		if ok2 {
+			err2 := frame_.Close()
+			if err2 != nil {
+				log.Printf("设备:%d, 错误: 无法关闭帧\n", device_id)
+			}
+		}
+	}
 	//设置当前帧
 	DeviceCurrentFrameMap.Store(device_id, frame)
 	frame_count, ok := DeviceFrameCount.Load(device_id)
@@ -138,10 +149,6 @@ func getVideoFrame(device proto.DeviceInfo) {
 			log.Printf("设备:%d 错误: 无法设置当前帧,err:%s \n", device.ID, err3.Error())
 		}
 		z++
-		err2 := frame.Close()
-		if err2 != nil {
-			log.Printf("设备:%d,计数z=%d, 错误: 无法关闭帧\n", device.ID, z)
-		}
 	}
 }