diff --git a/src/adv/AdvBlock.lua b/src/adv/AdvBlock.lua
index 91c986a..63606a0 100644
--- a/src/adv/AdvBlock.lua
+++ b/src/adv/AdvBlock.lua
@@ -51,7 +51,7 @@ function Block:updateEvent(event, isInit)
 	self.event = event
 	if not isInit and self.event then
 		-- 判断下类型是不是错的
-		if not self:getEventData() then
+		if not self:getEventData() and (self:getEventType() ~= AdvEventType.Drop or not self.event.item) then
 			self:clear()
 			assert(false, "updateEvent error, : event " .. (event.etype or "nil"))
 			return
--
libgit2 0.21.2