diff --git a/doc/_common.py b/doc/_common.py
index e1d3586f..c65f6a64 100644
--- a/doc/_common.py
+++ b/doc/_common.py
@@ -1943,6 +1943,6 @@ class HashRateGoods(object):
             ['item_id', 0, '道具id'],
             ['item_num', 0, '道具数量'],
             ['purchased_num', 0, '已购买数量'],
-            ['stock_num', 0, '库存数量(-1不限购)'],
+            ['max_num', 0, '最大数量(-1不限购)'],
             ['count_down', 0, '倒计时(单位秒,只有已售罄才有效)'],
         ]
diff --git a/webapp/controller/HashRateShopController.class.php b/webapp/controller/HashRateShopController.class.php
index 9a32f0da..1b09a9cc 100644
--- a/webapp/controller/HashRateShopController.class.php
+++ b/webapp/controller/HashRateShopController.class.php
@@ -2,6 +2,7 @@
 
 require_once('services/HashRateShopService.php');
 require_once('mt/HashRateShop.php');
+require_once('mt/Item.php');
 
 use mt;
 use phpcommon\SqlHelper;
@@ -40,10 +41,6 @@ class HashRateShop extends BaseAuthedController {
             myself()->_rspErr(1, 'no right to purchase');
             return;
         }
-        if ($goodsNum > $goodsMeta['max_amount']) {
-            myself()->_rspErr(1, "goods_num parameter error, max_amount: {$goodsMeta['max_amount']}");
-            return;
-        }
         $itemMeta = mt\Item::get($goodsMeta['item_id']);
         if (!$itemMeta) {
             myself()->_rspErr(1, 'goods not found, goods_id: ' . $goodsMeta['goods_id']);
@@ -51,7 +48,7 @@ class HashRateShop extends BaseAuthedController {
         }
         $errCode = 0;
         $errMsg = '';
-        if (!ShopService::buyLimitCheck($goodsMeta, $errCode, $errMsg)) {
+        if (!HashRateShopService::buyLimitCheck($goodsMeta, $goodsNum, $errCode, $errMsg)) {
             myself()->_rspErr($errCode, $errMsg);
             return;
         }
diff --git a/webapp/services/HashRateShopService.php b/webapp/services/HashRateShopService.php
index 94dfb32e..97fdf8bd 100644
--- a/webapp/services/HashRateShopService.php
+++ b/webapp/services/HashRateShopService.php
@@ -56,7 +56,7 @@ class HashRateShopService {
         return $goodsList;
     }
 
-    public static function buyLimitCheck($goodsMeta, &$errCode, &$errMsg)
+    public static function buyLimitCheck($goodsMeta, $goodsNum, &$errCode, &$errMsg)
     {
         $errCode = 0;
         $errMsg = '';
@@ -67,37 +67,47 @@ class HashRateShopService {
             switch ($goodsMeta['limit_type']) {
                 case mt\HashRateShop::DAILY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
-                    $boughtTimes = $buyRecord ? $buyRecord['this_day_buy_times'] + 1 : 1;
+                    $boughtTimes = $buyRecord ? $buyRecord['this_day_buy_times'] + $goodsNum : 1;
                     if ($buyRecord && getXVal($buyRecord, 'this_day_buy_times', 0) >= $goodsMeta['limit_num']) {
                         $errCode = 2;
                         $errMsg = 'Daily purchase limit';
                         return false;
                     }
                 }
-                    break;
+                break;
                 case mt\HashRateShop::WEEKLY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
-                    $boughtTimes = $buyRecord ? $buyRecord['this_week_buy_times'] + 1 : 1;
+                    $boughtTimes = $buyRecord ? $buyRecord['this_week_buy_times'] + $goodsNum : 1;
                     if ($buyRecord && getXVal($buyRecord, 'this_week_buy_times', 0) >= $goodsMeta['limit_num']) {
                         $errCode = 2;
                         $errMsg = 'Weekly purchase limit reached';
                         return false;
                     }
                 }
-                    break;
+                break;
+                case mt\HashRateShop::MONTH_BUY_LIMIT: {
+                    $buyRecord = getXVal($buyRecordHash, $goodsId);
+                    $boughtTimes = $buyRecord ? $buyRecord['this_month_buy_times'] + $goodsNum : 1;
+                    if ($buyRecord && getXVal($buyRecord, 'this_month_buy_times', 0) >= $goodsMeta['limit_num']) {
+                        $errCode = 2;
+                        $errMsg = 'month purchase limit reached';
+                        return false;
+                    }
+                }
+                break;
                 case mt\HashRateShop::TOTAL_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
-                    $boughtTimes = $buyRecord ? $buyRecord['total_buy_times'] + 1 : 1;
+                    $boughtTimes = $buyRecord ? $buyRecord['total_buy_times'] + $goodsNum : 1;
                     if ($buyRecord && getXVal($buyRecord, 'total_buy_times', 0) >= $goodsMeta['limit_num']) {
                         $errCode = 2;
                         $errMsg = 'Purchase limit reached';
                         return false;
                     }
                 }
-                    break;
+                break;
                 default: {
                 }
-                    break;
+                break;
             }
         }
         return true;