diff --git a/src/rooms/commands/DiscardCommand.ts b/src/rooms/commands/DiscardCommand.ts
index d993785..f9fff99 100644
--- a/src/rooms/commands/DiscardCommand.ts
+++ b/src/rooms/commands/DiscardCommand.ts
@@ -57,8 +57,8 @@ export class DiscardCommand extends Command<CardGameState, { client: Client, car
                 this.room.send(client,'discard_card_s2c', {errcode: 5, errmsg: '找不到要吃的牌'});
                 return;
             }
-            let tmpCards2 = tmpCards.concat(...this.state.cards.values())
-            if (!gameUtil.checkDiscard(tmpCards2, new GameEnv().otherEatCount)) {
+            tmpCards = tmpCards.concat(...this.state.cards.values())
+            if (!gameUtil.checkDiscard(tmpCards, new GameEnv().otherEatCount)) {
                 this.room.send(client,'discard_card_s2c', {errcode: 4, errmsg: '出牌不符合规则'});
                 return;
             }