diff --git a/apps/third/dahua.py b/apps/third/dahua.py
index efbe86ef..59bc90c5 100644
--- a/apps/third/dahua.py
+++ b/apps/third/dahua.py
@@ -146,11 +146,12 @@ class DhClient:
             "operation": "generalJsonTransport"
         }
         if '$' in code:
-            d_code = code.split('$')[0]
+            d_code_list = code.split('$')
+            d_code = d_code_list[0]
+            num = d_code_list[-1]
             json_data['deviceCode'] = d_code
             json_data['params'] = '{\"method\":\"dev.snap\",\"id\":123,\"params\":{\"DevID\":\"' + \
-                str(d_code) + '\",\"DevChannel\":\"' + \
-                str(code) + '\",\"PicNum\":1,\"SnapType\":1,\"CmdSrc\":0}}'
+                str(d_code) + '\",\"DevChannel\":' + str(num) + ',\"PicNum\":1,\"SnapType\":1,\"CmdSrc\":0}}'
         _, res = self.request(**dhapis['dev_snap'], json=json_data)
         res = json.loads(res)
         return self.get_full_pic(res['params']['PicInfo'])