diff --git a/config.py b/config.py
index 7f245ac..28d6416 100644
--- a/config.py
+++ b/config.py
@@ -34,5 +34,6 @@ QQ_API_MAX_RETRIES: int = int(os.environ.get("QQ_API_MAX_RETRIES", "2"))
 
 # ── 命令监听 ────────────────────────────────────────────────
 COMMAND_PREFIX: str = os.environ.get("COMMAND_PREFIX", "#")
-COMMAND_LENGTH: int = int(os.environ.get("COMMAND_LENGTH", "4"))
+COMMAND_LENGTH_MIN: int = int(os.environ.get("COMMAND_LENGTH_MIN", "2"))
+COMMAND_LENGTH_MAX: int = int(os.environ.get("COMMAND_LENGTH_MAX", "4"))
 COMMAND_CALLBACK_URL: str = os.environ.get("COMMAND_CALLBACK_URL", "")
diff --git a/handlers/command.py b/handlers/command.py
index 9197d57..545f705 100644
--- a/handlers/command.py
+++ b/handlers/command.py
@@ -4,13 +4,13 @@ import re
 
 import aiohttp
 
-from ..config import COMMAND_CALLBACK_URL, COMMAND_LENGTH, COMMAND_PREFIX
+from ..config import COMMAND_CALLBACK_URL, COMMAND_LENGTH_MAX, COMMAND_LENGTH_MIN, COMMAND_PREFIX
 
 
 def build_command_pattern() -> re.Pattern:
-    """构建命令匹配正则：# + N个中文字，后面可跟空格+内容或无内容。"""
+    """构建命令匹配正则：# + 2~4个中文字，后面可跟空格+内容或无内容。"""
     return re.compile(
-        rf"^{re.escape(COMMAND_PREFIX)}([\u4e00-\u9fff]{{{COMMAND_LENGTH}}})(?:\s+(.+))?$",
+        rf"^{re.escape(COMMAND_PREFIX)}([\u4e00-\u9fff]{{{COMMAND_LENGTH_MIN},{COMMAND_LENGTH_MAX}}})(?:\s+(.+))?$",
         re.DOTALL,
     )