diff --git a/application/api/controller/Room.php b/application/api/controller/Room.php
index d1e15539..162f5d37 100644
--- a/application/api/controller/Room.php
+++ b/application/api/controller/Room.php
@@ -189,7 +189,8 @@ class Room extends BaseCom
         $pit_number = input('pit_number', 0);
         $heart_id = input('heart_id', 0);
 
-        if($gift_id == 88){
+        $pool_gift_id = db::name('bb_lottery_config')->where(['key' => 'pool_gift_id'])->value('value');
+        if($gift_id == $pool_gift_id){
             $reslut = model('Lottery')->gift($this->uid, $to_uid, $gift_id, $room_id,$gift_num);
         }else{
             $reslut = model('Room')->room_gift($this->uid, $to_uid, $gift_id, $gift_num, $type, $room_id, $pit_number,$heart_id);
diff --git a/application/api/model/Lottery.php b/application/api/model/Lottery.php
index 30993a23..ca0cad94 100644
--- a/application/api/model/Lottery.php
+++ b/application/api/model/Lottery.php
@@ -23,8 +23,11 @@ class Lottery extends Model
         if(in_array($send_uid,$toarray)){
             return ['code' => 0, 'msg' => '收礼人不能包含自己', 'data' => null];
         }
+
+        //获取礼物信息
         $gift_info = Db::name('vs_gift')->where(['gid'=>$gift_id])
             ->field('gid as gift_id,gift_name,gift_price,file_type,base_image,play_image,gift_type,label,is_public_server')->find();
+
         //送给所有人的总价格
         $all_gift_price = $gift_info['gift_price'] * $num * count($toarray);
         //判断是否有足够的金币
diff --git a/application/common/library/LotteryGiftLua.php b/application/common/library/LotteryGiftLua.php
index fa30035b..6ad47631 100644
--- a/application/common/library/LotteryGiftLua.php
+++ b/application/common/library/LotteryGiftLua.php
@@ -126,6 +126,148 @@ if small_total_times >= small_trigger_times then
     end
 end
 
+-- 返回结果
+return cjson.encode(result)
+LUA;
+
+    }
+
+    // 获取Lua脚本
+    public static function getLotteryLuaScripts()
+    {
+        return <<<LUA
+-- 接收参数：
+-- send_uid, recv_uid, gift_gold, small_trigger_times, big_threshold, 
+-- small_round, big_round, big_total_gold,
+-- big_weight_60, big_weight_70, big_weight_80, big_weight_total
+local send_uid = ARGV[1]
+local recv_uid = ARGV[2]
+local gift_gold = tonumber(ARGV[3])
+local small_trigger_times = tonumber(ARGV[4])
+local big_threshold = tonumber(ARGV[5])
+local small_round = tonumber(ARGV[6])
+local big_round = tonumber(ARGV[7])
+local big_total_gold = tonumber(ARGV[8])
+local big_weight_60 = tonumber(ARGV[9])
+local big_weight_70 = tonumber(ARGV[10])
+local big_weight_80 = tonumber(ARGV[11])
+local big_weight_total = tonumber(ARGV[12])
+
+-- 核心约束：强制小轮次 ≥ 大轮次
+if small_round < big_round then
+    small_round = big_round
+end
+
+-- 1. 基础金额拆分
+local recv_gold = gift_gold * 0.5
+local small_pool_add = gift_gold * 0.5
+
+-- 2. Redis键定义
+local small_round_key = "lottery:small_pool:round"
+local small_total_times_key = "lottery:small_pool:total_times"
+local small_total_gold_key = "lottery:small_pool:total_gold"
+local big_round_key = "lottery:big_pool:round"
+local big_total_gold_key = "lottery:big_pool:total_gold"
+
+-- 初始化轮次
+redis.call('set', small_round_key, small_round)
+redis.call('set', big_round_key, big_round)
+if big_total_gold == 0 or big_total_gold == nil then
+    big_total_gold = tonumber(redis.call('get', big_total_gold_key) or 0)
+end
+
+-- 3. 小奖池累计更新
+local small_total_times = tonumber(redis.call('incr', small_total_times_key))
+local small_total_gold = tonumber(redis.call('get', small_total_gold_key) or 0)
+small_total_gold = math.floor((small_total_gold + small_pool_add) * 100) / 100
+redis.call('set', small_total_gold_key, small_total_gold)
+
+-- 4. 返回结果初始化
+local result = {
+    send_uid = send_uid,
+    recv_uid = recv_uid,
+    gift_gold = gift_gold,
+    recv_gold = recv_gold,
+    small_pool_add = small_pool_add,
+    small_total_times = small_total_times,
+    small_total_gold = small_total_gold,
+    is_small_prize = 0,
+    small_prize_amount = 0,
+    small_remain_amount = 0,
+    is_big_prize = 0,
+    big_prize_amount = 0,
+    big_release_amount = 0,
+    small_round = small_round,
+    big_round = big_round,
+    big_total_gold = big_total_gold,
+    small_prize_to_big_next_round = 0,
+    big_ratio = 0,
+    -- ===================== 新增核心字段 =====================
+    big_pool_total_before_open = 0 -- 大奖开奖前的奖池总金额
+    -- ======================================================
+}
+
+-- 5. 小奖池开奖判断
+if small_total_times >= small_trigger_times then
+    result.is_small_prize = 1
+    -- 小奖随机比例
+    local small_ratio = math.random(1, 99)
+    result.small_prize_amount = math.floor(small_total_gold * small_ratio / 100 * 100) / 100
+    result.small_remain_amount = math.floor((small_total_gold - result.small_prize_amount) * 100) / 100
+
+    -- 重置小奖池，小轮次+1
+    redis.call('set', small_total_times_key, 0)
+    redis.call('set', small_total_gold_key, 0)
+    small_round = small_round + 1
+    redis.call('set', small_round_key, small_round)
+    result.small_round = small_round
+
+    -- 6. 小奖剩余划入大奖池当前轮次
+    big_total_gold = math.floor((big_total_gold + result.small_remain_amount) * 100) / 100
+    redis.call('set', big_total_gold_key, big_total_gold)
+    result.big_total_gold = big_total_gold
+
+    -- 7. 大奖池开奖判断
+    if big_total_gold >= big_threshold then
+        -- ===================== 关键修改：记录开奖前总金额 =====================
+        result.big_pool_total_before_open = big_total_gold -- 保存开奖前的总金额
+        -- ======================================================
+        
+        result.is_big_prize = 1
+        -- 从配置读取权重计算出奖比例
+        local random_weight = math.random(1, big_weight_total)
+        local big_ratio = 60
+        if random_weight > big_weight_60 and random_weight <= (big_weight_60 + big_weight_70) then
+            big_ratio = 70
+        elseif random_weight > (big_weight_60 + big_weight_70) then
+            big_ratio = 80
+        end
+        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
+
+        -- 重置大奖池，大轮次+1
+        redis.call('set', big_total_gold_key, 0)
+        big_round = big_round + 1
+        redis.call('set', big_round_key, big_round)
+        if small_round < big_round then
+            small_round = big_round
+            redis.call('set', small_round_key, small_round)
+            result.small_round = small_round
+        end
+        result.big_round = big_round
+        result.big_total_gold = 0
+
+        -- 小奖开奖金额划入大奖池下一轮
+        result.small_prize_to_big_next_round = result.small_prize_amount
+        local new_big_total_gold = math.floor(result.small_prize_amount * 100) / 100
+        redis.call('set', big_total_gold_key, new_big_total_gold)
+        result.big_total_gold = new_big_total_gold
+    end
+end
+
 -- 返回结果
 return cjson.encode(result)
 LUA;
diff --git a/application/common/service/LotteryService.php b/application/common/service/LotteryService.php
index 3e4d235f..e66c32f0 100644
--- a/application/common/service/LotteryService.php
+++ b/application/common/service/LotteryService.php
@@ -12,6 +12,7 @@ class LotteryService
     private $redis;
     // 配置参数
     private $config;
+    private $bigPrizeWeights;
 
     public function __construct()
     {
@@ -19,10 +20,31 @@ class LotteryService
         // 加载配置
         $this->config = Db::name('bb_lottery_config')->column('value', 'key');
         // 初始化Redis缓存（若Redis数据丢失，从数据库恢复）
+        $this->initBigPrizeWeights();
         $this->initRedisFromDb();
+        $this->checkRoundConstraint();
     }
 
 
+    private function initBigPrizeWeights()
+    {
+        $this->bigPrizeWeights = [
+            '60' => intval($this->config['big_prize_ratio_60_weight'] ?? 20),
+            '70' => intval($this->config['big_prize_ratio_70_weight'] ?? 50),
+            '80' => intval($this->config['big_prize_ratio_80_weight'] ?? 30)
+        ];
+        $this->bigPrizeWeights['total'] = array_sum($this->bigPrizeWeights);
+    }
+
+    private function checkRoundConstraint()
+    {
+        $small_round = intval($this->redis->get('lottery:small_pool:round') ?: 1);
+        $big_round = intval($this->redis->get('lottery:big_pool:round') ?: 1);
+        if ($small_round < $big_round) {
+            $this->redis->set('lottery:small_pool:round', $big_round);
+        }
+    }
+
     /**
      * 缓存恢复：独立恢复大小轮次+对应金额
      */
@@ -92,13 +114,17 @@ class LotteryService
         $big_total_gold = floatval($this->redis->get('lottery:big_pool:total_gold') ?: 0);
 
         // 加载Lua脚本
-        $luaSha = LotteryGiftLua::getLotteryLuaScript();
+        $luaSha = LotteryGiftLua::getLotteryLuaScripts();
 
         // 执行Lua脚本（入参：small_round + big_round）
         $result = $this->redis->eval($luaSha, [
             $send_uid, 0, $gift_gold,
             $small_trigger_times, $big_threshold,
-            $small_round, $big_round, $big_total_gold
+            $small_round, $big_round, $big_total_gold,
+            $this->bigPrizeWeights['60'],
+            $this->bigPrizeWeights['70'],
+            $this->bigPrizeWeights['80'],
+            $this->bigPrizeWeights['total']
         ], 0);
 //        var_dump($result);die;
         $result = json_decode($result, true);
@@ -143,8 +169,8 @@ class LotteryService
                         $winnerUid,
                         2, // 大奖
                         $result['big_prize_amount'],//中奖金额
-                        $result['big_total_gold'], // 开奖时大奖池金额
-                        $this->getBigRatio($result['big_prize_amount'], $result['big_total_gold']),
+                        $result['big_pool_total_before_open'], // 开奖时大奖池金额
+                        $result['big_ratio'],
                         $result['big_release_amount']//释放金额
                     );
 
@@ -153,7 +179,7 @@ class LotteryService
                         2, // 大奖池
                         4, // 释放
                         -$result['big_release_amount'],//释放金额
-                        $result['big_total_gold'],// 开奖时大奖池金额
+                        $result['big_pool_total_before_open'],// 开奖时大奖池金额
                         0,
                         $giftId,
                         $result['big_round'] - 1, // 关联已结束的小奖池轮次