diff --git a/mofin_db.py b/mofin_db.py
index f319f6ab..ee2dec9e 100644
--- a/mofin_db.py
+++ b/mofin_db.py
@@ -1704,6 +1704,26 @@ def write_holding_strategy(conn, code: str, name: str, data: dict,
                     data['timing_signal'] = _old_sig
             except Exception:
                 pass
+        # ── 策略参数权威保护（2026-07-27 老爸：技术路径每2分钟覆写12维的Zone/SL/TP→RR波动→盯盘和XMPP不一致）──
+        # 新鲜(<20h)12维分析的技术参数不允许被技术路径覆写。
+        # RR的稳定性取决于 Zone/SL/TP —— 它们被覆写一次 RR 就变一次。
+        if source_trigger in _TECHNICAL_PATHS and _old_ra:
+            try:
+                from datetime import datetime as _ddt3, timedelta as _dtd3
+                _ra_dt3 = _ddt3.fromisoformat(str(_old_ra)[:19])
+                if (_ddt3.now() - _ra_dt3) < _dtd3(hours=20):
+                    _old_params = conn.execute(
+                        "SELECT entry_low, entry_high, stop_loss, take_profit FROM holding_strategies WHERE code=? AND status='active'",
+                        (code,)).fetchone()
+                    if _old_params:
+                        _keys = ['entry_low','entry_high','stop_loss','take_profit']
+                        _vals = [float(v) if v else 0 for v in _old_params]
+                        for i, k in enumerate(_keys):
+                            if _vals[i] > 0:
+                                data[k] = _vals[i]
+                        print(f"  [AUTHORITY-PARAM] {code} 保留12维参数(区{_vals[0]}~{_vals[1]} 损{_vals[2]} 盈{_vals[3]})", flush=True)
+            except Exception:
+                pass
         # ── action 权限保护（与信号同一权威层级，2026-07-22）──
         # 技术路径不得覆盖新鲜(<20h)12维 action。
         # 根治：技术路径写的"盈亏比不足1:1.5不建议买入"旧 action 与12维买入分析同框矛盾。