diff --git a/lualib/skynet/sharedata.lua b/lualib/skynet/sharedata.lua
index be62f67d..61478ad2 100644
--- a/lualib/skynet/sharedata.lua
+++ b/lualib/skynet/sharedata.lua
@@ -30,6 +30,10 @@ function sharedata.query(name)
 		return cache[name]
 	end
 	local obj = skynet.call(service, "lua", "query", name)
+	if cache[name] and cache[name].__obj == obj then
+		skynet.send(service, "lua", "confirm" , obj)
+		return cache[name]
+	end
 	local r = sd.box(obj)
 	skynet.send(service, "lua", "confirm" , obj)
 	skynet.fork(monitor,name, r, obj)