diff --git a/saiadmin-artd/src/locales/langs/en/dice/reward.json b/saiadmin-artd/src/locales/langs/en/dice/reward.json
index 25c2229..085a473 100644
--- a/saiadmin-artd/src/locales/langs/en/dice/reward.json
+++ b/saiadmin-artd/src/locales/langs/en/dice/reward.json
@@ -73,7 +73,7 @@
     "labelLotteryTypeFree": "Free tier pool",
     "labelAnte": "Ante",
     "placeholderAnte": "Select ante config",
-    "anteRandomOption": "Random (pick from channel ante configs)",
+    "anteRandomOption": "Random (each paid spin picks independently from channel ante configs)",
     "placeholderPaidPool": "Leave empty to set T1–T5 weights manually",
     "placeholderFreePool": "Leave empty to set T1–T5 weights manually",
     "selectedPoolHint": "Selected pool: {name}",
diff --git a/saiadmin-artd/src/locales/langs/zh/dice/reward.json b/saiadmin-artd/src/locales/langs/zh/dice/reward.json
index e981806..1f9ee80 100644
--- a/saiadmin-artd/src/locales/langs/zh/dice/reward.json
+++ b/saiadmin-artd/src/locales/langs/zh/dice/reward.json
@@ -73,7 +73,7 @@
     "labelLotteryTypeFree": "免费档位奖池",
     "labelAnte": "底注",
     "placeholderAnte": "请选择底注配置",
-    "anteRandomOption": "随机（从当前渠道底注配置中抽取）",
+    "anteRandomOption": "随机（每局付费抽奖从当前渠道底注配置中独立抽取）",
     "placeholderPaidPool": "不选则下方手动设定 T1–T5 档位权重",
     "placeholderFreePool": "不选则下方手动设定 T1–T5 档位权重",
     "selectedPoolHint": "已选奖池：{name}",
diff --git a/server/app/dice/logic/reward_config_record/DiceRewardConfigRecordLogic.php b/server/app/dice/logic/reward_config_record/DiceRewardConfigRecordLogic.php
index 20b6312..b868543 100644
--- a/server/app/dice/logic/reward_config_record/DiceRewardConfigRecordLogic.php
+++ b/server/app/dice/logic/reward_config_record/DiceRewardConfigRecordLogic.php
@@ -268,7 +268,8 @@ class DiceRewardConfigRecordLogic extends DiceBaseLogic
             is_array($params) ? $params : []
         );
         $allowed = [100, 500, 1000, 5000];
-        $ante = $this->resolveWeightTestAnte($params, $deptId);
+        $anteRandom = !empty($params['ante_random']);
+        $ante = $anteRandom ? 0 : $this->resolveWeightTestAnte($params, $deptId);
 
         $lotteryConfigId = isset($params['lottery_config_id']) ? (int) $params['lottery_config_id'] : 0;
         $paidConfigId = isset($params['paid_lottery_config_id']) ? (int) $params['paid_lottery_config_id'] : 0;
diff --git a/server/app/dice/logic/reward_config_record/WeightTestRunner.php b/server/app/dice/logic/reward_config_record/WeightTestRunner.php
index 568a860..5719455 100644
--- a/server/app/dice/logic/reward_config_record/WeightTestRunner.php
+++ b/server/app/dice/logic/reward_config_record/WeightTestRunner.php
@@ -5,6 +5,8 @@ namespace app\dice\logic\reward_config_record;
 
 use app\api\logic\PlayStartLogic;
 use app\dice\helper\AdminScopeHelper;
+use app\dice\helper\ConfigScopeEditHelper;
+use app\dice\model\ante_config\DiceAnteConfig;
 use app\dice\model\lottery_pool_config\DiceLotteryPoolConfig;
 use app\dice\model\play_record_test\DicePlayRecordTest;
 use app\dice\model\reward_config_record\DiceRewardConfigRecord;
@@ -60,7 +62,11 @@ class WeightTestRunner
             return;
         }
 
+        $anteRandom = $this->isAnteRandomMode($record);
         $ante = is_numeric($record->ante ?? null) ? intval($record->ante) : 1;
+        if (!$anteRandom && $ante <= 0) {
+            $ante = 1;
+        }
         $paidS = (int) ($record->paid_s_count ?? 0);
         $paidN = (int) ($record->paid_n_count ?? 0);
         $total = $paidS + $paidN;
@@ -140,6 +146,7 @@ class WeightTestRunner
                 $paidS,
                 $paidN,
                 $ante,
+                $anteRandom,
                 $configType0,
                 $paidPoolConfig,
                 $freePoolConfig,
@@ -180,6 +187,7 @@ class WeightTestRunner
         int $paidS,
         int $paidN,
         int $ante,
+        bool $anteRandom,
         $defaultPoolConfig,
         $paidPoolConfig,
         $freePoolConfig,
@@ -196,17 +204,22 @@ class WeightTestRunner
     ): void {
         $queue = [];
         for ($i = 0; $i < $paidS; $i++) {
-            $queue[] = ['paid', 0, $ante];
+            $queue[] = ['paid', 0, $anteRandom ? 0 : $ante];
         }
         for ($i = 0; $i < $paidN; $i++) {
-            $queue[] = ['paid', 1, $ante];
+            $queue[] = ['paid', 1, $anteRandom ? 0 : $ante];
         }
         $qi = 0;
         while ($qi < count($queue)) {
             $item = $queue[$qi];
             $isPaid = $item[0] === 'paid';
             $dir = $item[1];
-            $playAnte = $item[2];
+            $playAnte = (int) $item[2];
+            if ($isPaid && $anteRandom) {
+                $playAnte = $this->pickRandomAnteMult($deptId);
+            } elseif ($playAnte <= 0) {
+                $playAnte = $ante > 0 ? $ante : 1;
+            }
             $lotteryType = $isPaid ? 0 : 1;
 
             if ($isPaid) {
@@ -249,6 +262,36 @@ class WeightTestRunner
         }
     }
 
+    /**
+     * 是否启用「底注随机」：每局付费抽奖从当前渠道底注配置中独立抽取 mult
+     */
+    private function isAnteRandomMode(DiceRewardConfigRecord $record): bool
+    {
+        $snap = $record->tier_weights_snapshot ?? null;
+        if (!is_array($snap)) {
+            return false;
+        }
+
+        return !empty($snap['ante_random']);
+    }
+
+    /**
+     * 从当前渠道 dice_ante_config 中随机取一条 mult
+     */
+    private function pickRandomAnteMult(int $deptId): int
+    {
+        $anteQuery = DiceAnteConfig::field('id,mult')->order('mult', 'asc');
+        ConfigScopeEditHelper::applyDeptIdWhere($anteQuery, $deptId);
+        $rows = $anteQuery->select()->toArray();
+        if ($rows === []) {
+            return 1;
+        }
+        $picked = $rows[random_int(0, count($rows) - 1)];
+        $mult = (int) ($picked['mult'] ?? 0);
+
+        return $mult > 0 ? $mult : 1;
+    }
+
     /**
      * 从 tier_weights_snapshot 读取付费/免费档位权重快照
      */