diff --git a/src/config/config.py b/src/config/config.py
index 252b4a05..dcd5e7eb 100644
--- a/src/config/config.py
+++ b/src/config/config.py
@@ -56,7 +56,7 @@ BOT_CONFIG_PATH: Path = (CONFIG_DIR / "bot_config.toml").resolve().absolute()
 MODEL_CONFIG_PATH: Path = (CONFIG_DIR / "model_config.toml").resolve().absolute()
 LEGACY_ENV_PATH: Path = (PROJECT_ROOT / ".env").resolve().absolute()
 MMC_VERSION: str = "1.0.0"
-CONFIG_VERSION: str = "8.9.19"
+CONFIG_VERSION: str = "8.9.20"
 MODEL_CONFIG_VERSION: str = "1.14.3"
 
 logger = get_logger("config")
diff --git a/src/config/official_configs.py b/src/config/official_configs.py
index 41f469af..ba11426a 100644
--- a/src/config/official_configs.py
+++ b/src/config/official_configs.py
@@ -1324,6 +1324,15 @@ class DebugConfig(ConfigBase):
     )
     """是否记录 Replyer 请求体，默认关闭"""
 
+    enable_llm_cache_stats: bool = Field(
+        default=False,
+        json_schema_extra={
+            "x-widget": "switch",
+            "x-icon": "chart-no-axes-column",
+        },
+    )
+    """是否记录 LLM prompt cache 调试统计，默认关闭"""
+
 
 class ExtraPromptItem(ConfigBase):
     platform: str = Field(
diff --git a/src/services/llm_cache_stats.py b/src/services/llm_cache_stats.py
index e6b1c268..1d322ba4 100644
--- a/src/services/llm_cache_stats.py
+++ b/src/services/llm_cache_stats.py
@@ -182,6 +182,16 @@ class _LLMCacheStatsStore:
 _store = _LLMCacheStatsStore()
 
 
+def _is_llm_cache_stats_enabled() -> bool:
+    """读取调试配置，默认关闭 LLM prompt cache 统计。"""
+
+    try:
+        from src.config.config import global_config
+        return bool(global_config.debug.enable_llm_cache_stats)
+    except Exception:
+        return False
+
+
 def _normalize_request_type(request_type: str) -> str:
     normalized = str(request_type or "").strip()
     return normalized or "unknown"
@@ -1313,6 +1323,9 @@ def record_llm_cache_usage(
 ) -> None:
     """Record one LLM prompt cache usage event."""
 
+    if not _is_llm_cache_stats_enabled():
+        return
+
     normalized_task_name = str(task_name or "").strip()
     if normalized_task_name not in FOCUSED_TASK_NAMES:
         return