diff --git a/application/api/model/Lottery.php b/application/api/model/Lottery.php
index 785f0f44..39f10150 100644
--- a/application/api/model/Lottery.php
+++ b/application/api/model/Lottery.php
@@ -43,12 +43,6 @@ class Lottery extends Model
         $FromUserInfo['icon'][1] = model('UserData')->user_charm_icon($send_uid);//魅力图标
         $FromUserInfo['chat_bubble'] = model('Decorate')->user_decorate_detail($send_uid,9);//聊天气泡
 
-        $nums = $num * count($toarray);
-        $ress = $this->lottery($send_uid,$gift_info['gift_price'],$nums,$room_id,$gift_id,$FromUserInfo,$gift_info);
-        if($ress['code'] == 0){
-            return ['code' => 0, 'msg' => $ress['msg'], 'data' => null];
-        }
-
         //送礼 开启事务
         Db::startTrans();
         //扣除用户金币并记录日志
@@ -125,6 +119,14 @@ class Lottery extends Model
             model('api/Chat')->sendMsg(1005,$room_id,$text);
         }
         Db::commit();
+
+        //计算爆币
+        $nums = $num * count($toarray);
+        $ress = $this->lottery($send_uid,$gift_info['gift_price'],$nums,$room_id,$gift_id,$FromUserInfo,$gift_info);
+        if($ress['code'] == 0){
+            return ['code' => 0, 'msg' => $ress['msg'], 'data' => null];
+        }
+
         return ['code' => 1, 'msg' => '送礼成功', 'data' => null];
     }
 
diff --git a/application/common/library/LotteryGiftLua.php b/application/common/library/LotteryGiftLua.php
index 6ad47631..b705f0c4 100644
--- a/application/common/library/LotteryGiftLua.php
+++ b/application/common/library/LotteryGiftLua.php
@@ -245,8 +245,8 @@ if small_total_times >= small_trigger_times then
         result.big_ratio = big_ratio
 
         -- 大奖金额计算（基于开奖前的总金额）
-        result.big_prize_amount = math.floor(result.big_pool_total_before_open * big_ratio / 100 * 100) / 100
-        result.big_release_amount = math.floor((result.big_pool_total_before_open - result.big_prize_amount) * 100) / 100
+        result.big_prize_amount = math.floor(big_threshold * big_ratio / 100)
+        result.big_release_amount = math.floor(big_total_gold - result.big_prize_amount）
 
         -- 重置大奖池，大轮次+1
         redis.call('set', big_total_gold_key, 0)
diff --git a/application/common/service/LotteryService.php b/application/common/service/LotteryService.php
index 520ae515..6ac676f7 100644
--- a/application/common/service/LotteryService.php
+++ b/application/common/service/LotteryService.php
@@ -152,17 +152,17 @@ class LotteryService
                     2, // 大奖池
                     3, // 划转
                     $result['small_remain_amount'],//小奖剩余金额
-                    $result['big_total_gold'] - $result['small_remain_amount'],
-                    $result['big_total_gold'],
+                    $result['big_pool_total_before_open'] - $result['small_remain_amount'],
+                    $result['big_pool_total_before_open'],
                     $giftId,
                     $result['big_round'] - ($result['is_big_prize'] ? 1 : 0),
                     "小奖剩余划转大奖池：{$result['small_remain_amount']}金币"
                 );
 
-
                 //2.开小奖剩余划入大奖后 大奖够开奖
+                //开大奖
                 if ($result['is_big_prize'] == 1) {
-                    // 大奖中奖记录
+                    //2.1 大奖中奖记录
                     $this->addWinnerRecord(
                         $winnerUid,
                         2, // 大奖