diff --git a/src/plugin_system/apis/__init__.py b/src/plugin_system/apis/__init__.py
index a872bfc7..036c077e 100644
--- a/src/plugin_system/apis/__init__.py
+++ b/src/plugin_system/apis/__init__.py
@@ -19,7 +19,6 @@ from src.plugin_system.apis import (
     send_api,
     tool_api,
     frequency_api,
-    auto_talk_api,
 )
 from .logging_api import get_logger
 from .plugin_register_api import register_plugin
@@ -41,5 +40,4 @@ __all__ = [
     "register_plugin",
     "tool_api",
     "frequency_api",
-    "auto_talk_api",
 ]
diff --git a/src/plugin_system/apis/auto_talk_api.py b/src/plugin_system/apis/auto_talk_api.py
deleted file mode 100644
index 60ad9501..00000000
--- a/src/plugin_system/apis/auto_talk_api.py
+++ /dev/null
@@ -1,56 +0,0 @@
-from src.common.logger import get_logger
-
-logger = get_logger("auto_talk_api")
-
-
-def set_question_probability_multiplier(chat_id: str, multiplier: float) -> bool:
-    """
-    设置指定 chat_id 的主动发言概率乘数。
-
-    返回:
-        bool: 设置是否成功。仅当目标聊天为群聊(HeartFChatting)且存在时为 True。
-    """
-    try:
-        if not isinstance(chat_id, str):
-            raise TypeError("chat_id 必须是 str")
-        if not isinstance(multiplier, (int, float)):
-            raise TypeError("multiplier 必须是数值类型")
-
-        # 延迟导入以避免循环依赖
-        from src.chat.heart_flow.heartflow import heartflow as _heartflow
-
-        chat = _heartflow.heartflow_chat_list.get(chat_id)
-        if chat is None:
-            logger.warning(f"未找到 chat_id={chat_id} 的心流实例，无法设置乘数")
-            return False
-
-        # 仅对拥有该属性的群聊心流生效（鸭子类型，避免导入类）
-        if not hasattr(chat, "question_probability_multiplier"):
-            logger.warning(f"chat_id={chat_id} 实例不支持主动发言乘数设置")
-            return False
-
-        # 约束：不允许负值
-        value = float(multiplier)
-        if value < 0:
-            value = 0.0
-
-        chat.question_probability_multiplier = value
-        logger.info(f"[auto_talk_api] chat_id={chat_id} 主动发言乘数已设为 {value}")
-        return True
-    except Exception as e:
-        logger.error(f"设置主动发言乘数失败: {e}")
-        return False
-
-
-def get_question_probability_multiplier(chat_id: str) -> float:
-    """获取指定 chat_id 的主动发言概率乘数，未找到则返回 0。"""
-    try:
-        # 延迟导入以避免循环依赖
-        from src.chat.heart_flow.heartflow import heartflow as _heartflow
-
-        chat = _heartflow.heartflow_chat_list.get(chat_id)
-        if chat is None:
-            return 0.0
-        return float(getattr(chat, "question_probability_multiplier", 0.0))
-    except Exception:
-        return 0.0