diff --git a/apps/iot/src/iot_watchdog.erl b/apps/iot/src/iot_watchdog.erl
index 9ce2756..9aeea3c 100644
--- a/apps/iot/src/iot_watchdog.erl
+++ b/apps/iot/src/iot_watchdog.erl
@@ -133,7 +133,7 @@ handle_cast({detection, HostUUID, Name, Metric},
 
     case length(Warnings) > 0 of
         true ->
-            Subject = iolist_to_binary([<<"主机: "/utf8>>, Name, lists:join(<<"|">>, lists:reverse(Warnings))]),
+            Subject = iolist_to_binary([<<"主机: "/utf8>>, Name, <<" || ">>, lists:join(<<"|">>, lists:reverse(Warnings))]),
             Body = format_warn(Subject, Users, PriKey),
             case catch do_post(Url, Body) of
                 {ok, Resp} ->