diff --git a/scripts/data_platform/backfill_15min_baostock.py b/scripts/data_platform/backfill_15min_baostock.py
index 2f76c51..891d667 100644
--- a/scripts/data_platform/backfill_15min_baostock.py
+++ b/scripts/data_platform/backfill_15min_baostock.py
@@ -222,6 +222,8 @@ def main():
     parser.add_argument("--codes", help="指定股票代码，逗号分隔")
     parser.add_argument("--limit", type=int, default=0, help="限制处理数量（测试用）")
     parser.add_argument("--force", action="store_true", help="强制重建（覆盖已有BaoStock数据）")
+    parser.add_argument("--shard", type=int, default=None, help="分片号 (0-indexed，并行回填用)")
+    parser.add_argument("--total", type=int, default=1, help="总分片数（与 --shard 配合）")
     args = parser.parse_args()
 
     start_date = f"{args.start[:4]}-{args.start[4:6]}-{args.start[6:8]}"
@@ -247,9 +249,15 @@ def main():
     if args.limit > 0:
         codes = codes[:args.limit]
 
+    # 分片过滤（并行回填：每个 worker 处理 i % total == shard 的子集）
+    if args.shard is not None and args.total > 1:
+        codes = [s for i, s in enumerate(codes) if i % args.total == args.shard]
+
     logger.info("=" * 60)
     logger.info("BaoStock 15min全量重建开始")
     logger.info(f"  股票数: {len(codes)}")
+    if args.shard is not None:
+        logger.info(f"  分片: shard={args.shard}/{args.total}")
     logger.info(f"  日期范围: {start_date} ~ {end_date}")
     logger.info(f"  数据目录: {MINUTE_15_DIR}")
     logger.info(f"  旧数据备份: {BACKUP_DIR}")