diff --git a/backend/api/main.py b/backend/api/main.py
index 21b6b05..41db2a7 100644
--- a/backend/api/main.py
+++ b/backend/api/main.py
@@ -114,6 +114,16 @@ def setup_logging():
         # 让 handler 自己按组筛选（error/warning/info），这里只需要放宽到 INFO
         redis_handler.setLevel(logging.INFO)
         root_logger.addHandler(redis_handler)
+
+        # 诊断：启动时快速检测一次 Redis 可用性（失败不影响运行）
+        try:
+            client = redis_handler._get_redis()  # noqa: SLF001（仅用于诊断）
+            if client is None:
+                logging.getLogger(__name__).warning(f"⚠ Redis 日志写入未启用。REDIS_URL={redis_url}")
+            else:
+                logging.getLogger(__name__).info(f"✓ Redis 日志写入已启用。REDIS_URL={redis_url}")
+        except Exception:
+            pass
     except Exception:
         pass
 
diff --git a/backend/api/routes/system.py b/backend/api/routes/system.py
index 658e52c..774be68 100644
--- a/backend/api/routes/system.py
+++ b/backend/api/routes/system.py
@@ -125,6 +125,76 @@ class LogsConfigUpdate(BaseModel):
     include_debug_in_info: Optional[bool] = None
 
 
+def _beijing_time_str() -> str:
+    from datetime import datetime, timezone, timedelta
+
+    beijing_tz = timezone(timedelta(hours=8))
+    return datetime.now(tz=beijing_tz).strftime("%Y-%m-%d %H:%M:%S")
+
+
+@router.post("/logs/test-write")
+async def logs_test_write(
+    x_admin_token: Optional[str] = Header(default=None, alias="X-Admin-Token"),
+) -> Dict[str, Any]:
+    """
+    写入 3 条测试日志到 Redis（error/warning/info），用于验证“是否写入到同一台 Redis、同一组 key”。
+    """
+    _require_admin(os.getenv("SYSTEM_CONTROL_TOKEN", "").strip(), x_admin_token)
+
+    client = _get_redis_client_for_logs()
+    if client is None:
+        raise HTTPException(status_code=503, detail="Redis 不可用，无法写入测试日志")
+
+    cfg = _read_logs_config(client)
+    now_ms = int(__import__("time").time() * 1000)
+    time_str = _beijing_time_str()
+
+    entries = {
+        "error": {"level": "ERROR", "message": f"[TEST] backend 写入 error 测试日志 @ {time_str}"},
+        "warning": {"level": "WARNING", "message": f"[TEST] backend 写入 warning 测试日志 @ {time_str}"},
+        "info": {"level": "INFO", "message": f"[TEST] backend 写入 info 测试日志 @ {time_str}"},
+    }
+
+    day = _beijing_yyyymmdd()
+    stats_prefix = _logs_stats_prefix()
+
+    pipe = client.pipeline()
+    for g in LOG_GROUPS:
+        key = _logs_key_for_group(g)
+        max_len = int(cfg["max_len"][g])
+        entry = {
+            "ts": now_ms,
+            "time": time_str,
+            "service": "backend",
+            "level": entries[g]["level"],
+            "logger": "api.routes.system",
+            "message": entries[g]["message"],
+            "hostname": os.getenv("HOSTNAME", ""),
+            "signature": f"backend|{entries[g]['level']}|test|{entries[g]['message']}",
+            "count": 1,
+        }
+        pipe.lpush(key, json.dumps(entry, ensure_ascii=False))
+        if max_len > 0:
+            pipe.ltrim(key, 0, max_len - 1)
+        pipe.incr(f"{stats_prefix}:{day}:{g}", 1)
+        pipe.expire(f"{stats_prefix}:{day}:{g}", 14 * 24 * 3600)
+
+    pipe.execute()
+
+    # 返回写入后的 LLEN，便于你确认
+    pipe2 = client.pipeline()
+    for g in LOG_GROUPS:
+        pipe2.llen(_logs_key_for_group(g))
+    llens = pipe2.execute()
+
+    return {
+        "message": "ok",
+        "keys": {g: _logs_key_for_group(g) for g in LOG_GROUPS},
+        "llen": {g: int(llens[i] or 0) for i, g in enumerate(LOG_GROUPS)},
+        "note": "如果你在前端仍看不到，说明前端请求的后端实例/Redis key/筛选条件不一致。",
+    }
+
+
 def _get_redis_client_for_logs():
     """
     获取 Redis 客户端（优先复用 config_manager 的连接；失败则自行创建）。
diff --git a/frontend/src/components/LogMonitor.jsx b/frontend/src/components/LogMonitor.jsx
index 6bb42a1..c601235 100644
--- a/frontend/src/components/LogMonitor.jsx
+++ b/frontend/src/components/LogMonitor.jsx
@@ -113,6 +113,16 @@ export default function LogMonitor() {
     }
   }
 
+  const writeTest = async () => {
+    setError('')
+    try {
+      await api.writeLogsTest()
+      await load()
+    } catch (e) {
+      setError(e?.message || '写入测试日志失败')
+    }
+  }
+
   const goFirstPage = () => setPageStart(0)
   const goNextPage = () => setPageStart(pageMeta?.next_start || 0)
   const goPrevPage = () => setPageStart(Math.max(0, pageStart - Number(limit || 200)))
@@ -130,6 +140,9 @@ export default function LogMonitor() {
           <button className="btn" onClick={load} disabled={loading}>
             刷新
           </button>
+          <button className="btn" onClick={writeTest} disabled={loading}>
+            写入测试日志
+          </button>
         </div>
       </div>
 
diff --git a/frontend/src/services/api.js b/frontend/src/services/api.js
index 9c32137..f7999c1 100644
--- a/frontend/src/services/api.js
+++ b/frontend/src/services/api.js
@@ -331,4 +331,16 @@ export const api = {
     }
     return response.json();
   },
+
+  writeLogsTest: async () => {
+    const response = await fetch(buildUrl('/api/system/logs/test-write'), {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+    });
+    if (!response.ok) {
+      const error = await response.json().catch(() => ({ detail: '写入测试日志失败' }));
+      throw new Error(error.detail || '写入测试日志失败');
+    }
+    return response.json();
+  },
 };
diff --git a/trading_system/main.py b/trading_system/main.py
index 28b45fa..77ebae8 100644
--- a/trading_system/main.py
+++ b/trading_system/main.py
@@ -65,10 +65,13 @@ logging.basicConfig(
 
 # 追加：将 ERROR 日志写入 Redis（不影响现有文件/控制台日志）
 try:
-    if __name__ == '__main__':
-        from redis_log_handler import RedisErrorLogHandler, RedisLogConfig
-    else:
+    # 兼容两种启动方式：
+    # - 直接运行：python trading_system/main.py
+    # - 模块运行：python -m trading_system.main
+    try:
         from .redis_log_handler import RedisErrorLogHandler, RedisLogConfig
+    except Exception:
+        from redis_log_handler import RedisErrorLogHandler, RedisLogConfig
 
     redis_cfg = RedisLogConfig(
         redis_url=getattr(config, "REDIS_URL", "redis://localhost:6379"),
@@ -83,6 +86,22 @@ try:
     # 让 handler 自己按组筛选（error/warning/info），这里只需要放宽到 INFO
     redis_handler.setLevel(logging.INFO)
     logging.getLogger().addHandler(redis_handler)
+
+    # 诊断：启动时快速检测一次 Redis 可用性（失败不影响运行）
+    try:
+        client = redis_handler._get_redis()  # noqa: SLF001（仅用于诊断）
+        if client is None:
+            logger = logging.getLogger(__name__)
+            logger.warning(
+                f"⚠ Redis 日志写入未启用（无法连接或缺少依赖）。REDIS_URL={getattr(config, 'REDIS_URL', None)}"
+            )
+        else:
+            logger = logging.getLogger(__name__)
+            logger.info(
+                f"✓ Redis 日志写入已启用。REDIS_URL={getattr(config, 'REDIS_URL', None)}"
+            )
+    except Exception:
+        pass
 except Exception:
     # Redis handler 仅用于增强监控，失败不影响交易系统启动
     pass