diff --git a/monitor.py b/monitor.py
index a8f6a65..a20e277 100644
--- a/monitor.py
+++ b/monitor.py
@@ -579,10 +579,19 @@ class MessageMonitor:
         for pat in garbage_patterns:
             if re.search(pat, text, re.IGNORECASE):
                 return True
-        # 全字母数字+标点无中文 → 肯定是非聊天内容
         cjk_count = sum(1 for c in text if '\u4e00' <= c <= '\u9fff')
-        if cjk_count == 0 and len(text.strip()) > 20:
+        # 全字母数字+标点无中文 → 肯定是非聊天内容（阈值降到 15）
+        if cjk_count == 0 and len(text.strip()) > 15:
             return True
+        # OCR 随机字符垃圾：无中文 + 特殊字符比例高（如 = ~ @ # $ % ^ & *）
+        # EasyOCR 在包含头像/表情/特殊 UI 的区域会输出 544UUJ1W H V=YJ~JL:e 这类乱码
+        if cjk_count == 0 and len(text.strip()) >= 8:
+            special_chars = sum(1 for c in text if c in '=~@#$%^&*_+{}[]|\\<>/`!')
+            alpha_count = sum(1 for c in text if c.isalpha())
+            digit_count = sum(1 for c in text if c.isdigit())
+            # 特殊字符占比过高（>15%）且字母数字混杂 → OCR 乱码
+            if special_chars / len(text) > 0.15 and alpha_count >= 2 and digit_count >= 2:
+                return True
         return False
 
     def _validate_qq_window(self, hwnd: int) -> bool:
@@ -1065,6 +1074,15 @@ class MessageMonitor:
             # OCR 碎片：≤8 字符且无中文 → 时间戳/checkbox 残片
             if len(line) <= 8 and not re.search(r'[\u4e00-\u9fff]', line):
                 continue
+            # OCR 随机字符垃圾：无中文 + 特殊字符比例高（如 `544UUJ1W H V=YJ~JL:e`）
+            # EasyOCR 对头像/表情/特殊 UI 区域会输出这类无意义字母数字符号组合
+            if not re.search(r'[\u4e00-\u9fff]', line) and len(line) >= 10:
+                special_chars = sum(1 for c in line if c in '=~@#$%^&*_+{}[]|\\<>/`')
+                alpha_count = sum(1 for c in line if c.isalpha())
+                digit_count = sum(1 for c in line if c.isdigit())
+                if special_chars / len(line) > 0.15 and alpha_count >= 2 and digit_count >= 2:
+                    logger.debug(f"[{platform}] OCR 过滤: 随机字符垃圾 line={line!r}")
+                    continue
             # checkbox 残片：`[V]` `[X]` `[√]` 开头，明显不是用户提问
             if re.match(r'^\[[VX√✗]\s*\](?:\s*[A-Za-z0-9_\-./]+)?\s*$', line):
                 logger.debug(f"[{platform}] OCR 过滤: checkbox残片 line={line!r}")