diff --git a/src/main/java/com/hisense/monitormanage/mapper/CameraChannelMapper.java b/src/main/java/com/hisense/monitormanage/mapper/CameraChannelMapper.java
index be4c053..2d65fe4 100644
--- a/src/main/java/com/hisense/monitormanage/mapper/CameraChannelMapper.java
+++ b/src/main/java/com/hisense/monitormanage/mapper/CameraChannelMapper.java
@@ -15,7 +15,7 @@ public interface CameraChannelMapper extends BaseMapper<CameraChannel> {
 
     List<CameraChannelDto> selectAll(CameraChannel cameraChannel,@Param("page") Integer page,@Param("pageSize") Integer pageSize);
 
-    @Select("select cc.*,cp.pic_url from t_camera_channel cc JOIN t_channel_picture cp ON cc.channel_code=cp.channel_code where cc.channel_id = #{channelId}")
+    @Select("select cc.*,cp.pic_url from t_camera_channel cc LEFT JOIN t_channel_picture cp ON cc.channel_code=cp.channel_code where cc.channel_id = #{channelId}")
     List<CameraChannelDto1> selectByChannelId(@Param("channelId") String channelId);
 
     @Select("select * from t_camera_channel where parent_id = #{parentId}")