diff --git a/yudao-module-mall/yudao-module-promotion/src/main/java/cn/iocoder/yudao/module/promotion/service/combination/CombinationRecordServiceImpl.java b/yudao-module-mall/yudao-module-promotion/src/main/java/cn/iocoder/yudao/module/promotion/service/combination/CombinationRecordServiceImpl.java
index 862e130..46929ca 100644
--- a/yudao-module-mall/yudao-module-promotion/src/main/java/cn/iocoder/yudao/module/promotion/service/combination/CombinationRecordServiceImpl.java
+++ b/yudao-module-mall/yudao-module-promotion/src/main/java/cn/iocoder/yudao/module/promotion/service/combination/CombinationRecordServiceImpl.java
@@ -77,7 +77,6 @@ public class CombinationRecordServiceImpl implements CombinationRecordService {
     @Resource
     public SocialClientApi socialClientApi;
 
-    // TODO @芋艿：在详细预览下；
     @Override
     public KeyValue<CombinationActivityDO, CombinationProductDO> validateCombinationRecord(
             Long userId, Long activityId, Long headId, Long skuId, Integer count) {
@@ -97,7 +96,7 @@ public class CombinationRecordServiceImpl implements CombinationRecordService {
         }
 
         // 2. 父拼团是否存在,是否已经满了
-        if (headId != null) {
+        if (isJoinCombination(headId)) {
             // 2.1. 查询进行中的父拼团
             CombinationRecordDO record = combinationRecordMapper.selectByHeadId(headId, CombinationRecordStatusEnum.IN_PROGRESS.getStatus());
             if (record == null) {
@@ -153,6 +152,16 @@ public class CombinationRecordServiceImpl implements CombinationRecordService {
         return new KeyValue<>(activity, product);
     }
 
+    /**
+     * 是否加入已有拼团。
+     *
+     * 前端开团时可能不传 headId，也可能传 {@link CombinationRecordDO#HEAD_ID_GROUP}，都应视为新开团；
+     * 只有传入真实团长记录编号时，才需要按参团校验父拼团。
+     */
+    private static boolean isJoinCombination(Long headId) {
+        return headId != null && ObjUtil.notEqual(headId, CombinationRecordDO.HEAD_ID_GROUP);
+    }
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public CombinationRecordDO createCombinationRecord(CombinationRecordCreateReqDTO reqDTO) {
@@ -166,7 +175,7 @@ public class CombinationRecordServiceImpl implements CombinationRecordService {
         ProductSkuRespDTO sku = productSkuApi.getSku(reqDTO.getSkuId());
         CombinationRecordDO record = CombinationActivityConvert.INSTANCE.convert(reqDTO, keyValue.getKey(), user, spu, sku);
         // 2.1. 如果是团长需要设置 headId 为 CombinationRecordDO#HEAD_ID_GROUP
-        if (record.getHeadId() == null) {
+        if (!isJoinCombination(record.getHeadId())) {
             record.setStartTime(LocalDateTime.now())
                     .setExpireTime(LocalDateTime.now().plusHours(keyValue.getKey().getLimitDuration()))
                     .setHeadId(CombinationRecordDO.HEAD_ID_GROUP);