diff --git a/backend/core/conf.py b/backend/core/conf.py
index a9e5cdba..e04e0ee2 100644
--- a/backend/core/conf.py
+++ b/backend/core/conf.py
@@ -5,9 +5,10 @@ from re import Pattern
 from typing import Any, Literal
 
 from pydantic import model_validator
-from pydantic_settings import BaseSettings, SettingsConfigDict
+from pydantic_settings import BaseSettings, PydanticBaseSettingsSource, SettingsConfigDict
 
 from backend.core.path_conf import ENV_EXAMPLE_FILE_PATH, ENV_FILE_PATH
+from backend.plugin.settings_source import PluginSettingsSource
 
 
 class Settings(BaseSettings):
@@ -16,10 +17,22 @@ class Settings(BaseSettings):
     model_config = SettingsConfigDict(
         env_file=ENV_FILE_PATH,
         env_file_encoding='utf-8',
-        extra='ignore',
+        extra='allow',
         case_sensitive=True,
     )
 
+    @classmethod
+    def settings_customise_sources(
+        cls,
+        settings_cls: type[BaseSettings],
+        init_settings: PydanticBaseSettingsSource,
+        env_settings: PydanticBaseSettingsSource,
+        dotenv_settings: PydanticBaseSettingsSource,
+        file_secret_settings: PydanticBaseSettingsSource,
+    ) -> tuple[PydanticBaseSettingsSource, ...]:
+        """自定义配置源优先级"""
+        return env_settings, dotenv_settings, PluginSettingsSource(settings_cls)
+
     # .env 当前环境
     ENVIRONMENT: Literal['dev', 'prod']
 
diff --git a/backend/plugin/settings_source.py b/backend/plugin/settings_source.py
new file mode 100644
index 00000000..4e4405c9
--- /dev/null
+++ b/backend/plugin/settings_source.py
@@ -0,0 +1,39 @@
+import os
+
+from typing import Any
+
+import rtoml
+
+from pydantic.fields import FieldInfo
+from pydantic_settings import PydanticBaseSettingsSource
+
+from backend.core.path_conf import PLUGIN_DIR
+
+
+class PluginSettingsSource(PydanticBaseSettingsSource):
+    """从所有插件的 plugin.toml 加载配置的自定义配置源"""
+
+    def get_field_value(self, field: FieldInfo, field_name: str) -> tuple[Any, str, bool]:
+        """获取单个字段的值"""
+        # 不在这里实现，使用 __call__ 批量加载
+        return None, field_name, False
+
+    def __call__(self) -> dict[str, Any]:
+        """加载所有插件配置"""
+        merged_settings: dict[str, Any] = {}
+
+        for item in os.listdir(PLUGIN_DIR):
+            item_path = PLUGIN_DIR / item
+            if not os.path.isdir(item_path):
+                continue
+            if '__init__.py' not in os.listdir(item_path):
+                continue
+
+            toml_path = item_path / 'plugin.toml'
+            if toml_path.exists():
+                with open(toml_path, encoding='utf-8') as f:
+                    config = rtoml.load(f)
+                    plugin_settings = config.get('settings', {})
+                    merged_settings.update(plugin_settings)
+
+        return merged_settings