diff --git a/scripts/data_platform/akshare_static_download.py b/scripts/data_platform/akshare_static_download.py
index 4891eeb..4402adb 100644
--- a/scripts/data_platform/akshare_static_download.py
+++ b/scripts/data_platform/akshare_static_download.py
@@ -54,6 +54,8 @@
   python akshare_static_download.py --types dragon_tiger --start 20260101 --end 20260715
   # 强制重下
   python akshare_static_download.py --types valuation --force
+  # gdhs 一次性补史 (滚动 3 年窗之外, marker 幂等):
+  python akshare_static_download.py --types gdhs --gdhs-start 20130331
 
 输出目录结构 (OUT_DIR/data/static):
   {OUT_DIR}/
@@ -874,21 +876,31 @@ def download_one_unit(
 
 def build_gdhs_units(
     now: Optional[datetime.date] = None,
+    gdhs_start: Optional[str] = None,
 ) -> List[Tuple[str, Callable[[], pd.DataFrame]]]:
     """构造 gdhs units: 近 3 年季度末 × 披露守卫, 每期 1 unit。
 
     只枚举距今 >GDHS_DISCLOSE_DAYS 的季度末 (披露完毕), 防止未披露期拉回
     空 df 走「真空写空+done」语义后被 marker 锁死永不重拉。marker 去重:
     已抓期 skip, 无新期时零网络调用 (ak-weekly 每周六空转)。
+
+    gdhs_start (YYYYMMDD, --gdhs-start): 一次性补史入口, 枚举扩到该起点
+    (2026-09-08 实测源头边界: 东财端点最早 2013Q1 有货, 2012Q4 及更早返空)。
+    已 marker 的期照旧 skip → 重跑幂等; 老期披露守卫天然满足。
     """
     now = now or datetime.date.today()
     cutoff = now - datetime.timedelta(days=GDHS_DISCLOSE_DAYS)
+    # floor=min(起点, 窗起点): 起点晚于滚动窗起点时退化为默认枚举, 绝不收窄周更覆盖
+    window_floor = datetime.date(now.year - 2, 1, 1)
+    floor = (min(datetime.datetime.strptime(gdhs_start, "%Y%m%d").date(), window_floor)
+             if gdhs_start else window_floor)
     periods = []
-    for y in range(now.year - 2, now.year + 1):
+    for y in range(floor.year, now.year + 1):
         for (m, d) in [(3, 31), (6, 30), (9, 30), (12, 31)]:
             p = datetime.date(y, m, d)
-            if p <= cutoff:
-                periods.append(f"{y}{m:02d}{d:02d}")
+            if p > cutoff or p < floor:
+                continue
+            periods.append(f"{y}{m:02d}{d:02d}")
     units = [(f"{p}_{GDHS}", partial(fetch_gdhs, p)) for p in periods]
     logger.info(
         "[%s] 季度末 %d 个 (披露守卫 >%d 天, %s..%s)",
@@ -1175,6 +1187,9 @@ def parse_args() -> argparse.Namespace:
         help="限制处理股票数 (per-stock 类生效), 测试用",
     )
     p.add_argument("--force", action="store_true", help="强制重下, 忽略 marker")
+    p.add_argument("--gdhs-start", default="",
+                   help="gdhs 一次性补史起点 YYYYMMDD (源头最早 20130331); "
+                        "默认仅滚动 3 年窗")
     p.add_argument(
         "--repair", action="store_true",
         help="只重取 missing/empty(size<1KB 或 df.empty)/corrupt 的 parquet, "
@@ -1245,7 +1260,7 @@ def run_type_dispatch(
         return run_one_type(t, units, args)
 
     if t == GDHS:
-        units = build_gdhs_units()
+        units = build_gdhs_units(gdhs_start=args.gdhs_start or None)
         return run_one_type(t, units, args)
 
     if t in PER_PERIOD_TYPES:
diff --git a/tests/data_platform/test_akshare_static_download.py b/tests/data_platform/test_akshare_static_download.py
index 25b6544..33d269d 100644
--- a/tests/data_platform/test_akshare_static_download.py
+++ b/tests/data_platform/test_akshare_static_download.py
@@ -207,6 +207,27 @@ class TestHotAndGdhsFamily:
         assert "20250930_gdhs" in ids
         assert "20251231_gdhs" not in ids
 
+    def test_gdhs_units_backfill_flag_extends_history(self):
+        """--gdhs-start 一次性补史: 枚举扩到指定起点; 默认(无 flag)行为零变化。
+
+        源头边界 (2026-09-08 实测): 东财端点最早 2013Q1 有货, 2012Q4 及更早
+        返回空 → akshare 内部 TypeError。补史从 20130331 起枚举无死期。
+        """
+        import datetime as _dt
+        now = _dt.date(2026, 9, 8)
+        # 默认: 滚动 3 年窗 9 期, 与线上现状一致
+        ids = [u[0] for u in mod.build_gdhs_units(now=now)]
+        assert ids[0] == "20240331_gdhs" and len(ids) == 9
+        # 补史: 2013Q1 起, 新增 44 期 (2013Q1..2023Q4), 与滚动窗无缝衔接
+        ids2 = [u[0] for u in mod.build_gdhs_units(now=now, gdhs_start="20130331")]
+        assert ids2[0] == "20130331_gdhs"
+        assert len(ids2) == len(ids) + 44
+        assert len(set(ids2)) == len(ids2) and ids2 == sorted(ids2)
+        assert ids2[-9:] == ids
+        # 起点晚于滚动窗起点 → 退化为默认枚举
+        ids3 = [u[0] for u in mod.build_gdhs_units(now=now, gdhs_start="20250101")]
+        assert ids3 == ids
+
 
 # ======================== ③ northbound 无数据崩溃安全包装 ========================