diff --git a/app_logger.py b/app_logger.py
index b2e84c0..239d92c 100755
--- a/app_logger.py
+++ b/app_logger.py
@@ -7,6 +7,7 @@
 
 import logging
 import os
+import re
 from logging.handlers import RotatingFileHandler
 from datetime import datetime
 import threading
@@ -45,6 +46,31 @@ class ColoredFormatter(logging.Formatter):
         return result
 
 
+class SensitiveDataFilter(logging.Filter):
+    """对日志中的敏感字段做统一脱敏处理。"""
+
+    _EMAIL_RE = re.compile(r"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b")
+    _PAIR_PATTERNS = (
+        (re.compile(r"(?i)\b(password|passwd|pwd)\s*[:=]\s*([^,\s]+)"), r"\1=[REDACTED]"),
+        (re.compile(r"(?i)\b(token|csrf_token|session|authorization)\s*[:=]\s*([^,\s]+)"), r"\1=[REDACTED]"),
+        (re.compile(r"(?i)\b(user_id|admin_id|token_id)\s*=\s*\d+\b"), r"\1=[MASKED]"),
+    )
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        try:
+            message = record.getMessage()
+            sanitized = self._EMAIL_RE.sub("[REDACTED_EMAIL]", message)
+            for pattern, replacement in self._PAIR_PATTERNS:
+                sanitized = pattern.sub(replacement, sanitized)
+            if sanitized != message:
+                record.msg = sanitized
+                record.args = ()
+        except Exception:
+            # 日志过滤异常不应影响业务日志输出
+            pass
+        return True
+
+
 def setup_logger(name='app', level=None, log_file=None, max_bytes=10*1024*1024, backup_count=5):
     """
     设置日志记录器
@@ -74,6 +100,17 @@ def setup_logger(name='app', level=None, log_file=None, max_bytes=10*1024*1024,
 
         # 清除已有的处理器（避免重复）
         logger.handlers.clear()
+        logger.filters.clear()
+
+        # 全局敏感日志脱敏（默认开启，可通过 LOG_REDACT_SENSITIVE=0 关闭）
+        redact_enabled = str(os.environ.get("LOG_REDACT_SENSITIVE", "1")).strip().lower() in {
+            "1",
+            "true",
+            "yes",
+            "on",
+        }
+        if redact_enabled:
+            logger.addFilter(SensitiveDataFilter())
 
         # 日志格式
         detailed_formatter = logging.Formatter(