diff --git a/README.md b/README.md
index aa6afae..0993cb7 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,56 @@ asyncio.run(main())
 - Using LocalSandboxManager: Uniformly orchestrate lifecycle/cleanup of multiple sandboxes on local machine; suitable for service-oriented, multi-task parallel scenarios
 - Using HttpSandboxManager: Manage sandboxes uniformly through remote HTTP service; suitable for cross-machine/distributed or stronger isolation deployments
 
+### 0) Manager Factory: SandboxManagerFactory (Automatic Local/HTTP selection)
+
+When to use:
+- You want a single entry point that chooses Local or HTTP manager automatically.
+- You prefer central registration and discovery of available manager types.
+
+Key points:
+- If manager_type is provided, it is used directly.
+- If base_url is provided (in config or kwargs), HTTP manager is created.
+- Otherwise, Local manager is created by default.
+
+Example: implicit selection by base_url
+```python
+import asyncio
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+
+async def main():
+    async with SandboxManagerFactory.create_manager(base_url='http://127.0.0.1:8000') as m:
+        # Use exactly like HttpSandboxManager
+        # e.g., create a DOCKER sandbox and execute a tool
+        # ... your code ...
+        pass
+
+asyncio.run(main())
+```
+
+Example: explicit selection + custom config
+```python
+import asyncio
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+from ms_enclave.sandbox.model import SandboxManagerConfig, SandboxManagerType
+
+async def main():
+    cfg = SandboxManagerConfig(cleanup_interval=600)
+    async with SandboxManagerFactory.create_manager(
+        manager_type=SandboxManagerType.LOCAL, config=cfg
+    ) as m:
+        # Use exactly like LocalSandboxManager
+        # ... your code ...
+        pass
+
+asyncio.run(main())
+```
+
+Discover registered manager types:
+```python
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+print(SandboxManagerFactory.get_registered_types())
+```
+
 ### 1) Direct Sandbox Creation: SandboxFactory (Lightweight, Temporary)
 
 Use Cases:
@@ -189,6 +239,66 @@ async def main():
 asyncio.run(main())
 ```
 
+### 4) Pooled Sandboxes: Pre-warmed workers (Sandbox Pool)
+
+Why:
+- Amortize container startup by keeping a fixed-size pool of ready sandboxes.
+- Each execution borrows a sandbox and returns it; requests queue FIFO when all are busy.
+
+Local pool example:
+
+```python
+import asyncio
+from ms_enclave.sandbox.manager import LocalSandboxManager
+from ms_enclave.sandbox.model import DockerSandboxConfig, SandboxType
+
+async def main():
+    async with LocalSandboxManager() as m:
+        cfg = DockerSandboxConfig(
+            image='python:3.11-slim',
+            tools_config={'python_executor': {}}
+        )
+        # Create a pool of 2 pre-warmed sandboxes
+        await m.initialize_pool(pool_size=2, sandbox_type=SandboxType.DOCKER, config=cfg)
+
+        # Execute multiple tasks; sandboxes are reused and queued FIFO when busy
+        tasks = [
+            m.execute_tool_in_pool('python_executor', {'code': f'print("task {i}")', 'timeout': 30})
+            for i in range(5)
+        ]
+        results = await asyncio.gather(*tasks)
+        print([r.output.strip() for r in results])
+
+        # Pool stats
+        stats = await m.get_stats()
+        print('pool_size =', stats['pool_size'])
+
+asyncio.run(main())
+```
+
+HTTP pool example:
+
+```python
+import asyncio
+from ms_enclave.sandbox.manager import HttpSandboxManager
+from ms_enclave.sandbox.model import DockerSandboxConfig, SandboxType
+
+async def main():
+    async with HttpSandboxManager(base_url='http://127.0.0.1:8000') as m:
+        cfg = DockerSandboxConfig(image='python:3.11-slim', tools_config={'python_executor': {}})
+        await m.initialize_pool(pool_size=2, sandbox_type=SandboxType.DOCKER, config=cfg)
+
+        r = await m.execute_tool_in_pool('python_executor', {'code': 'print("hello from pool")', 'timeout': 30})
+        print(r.output)
+
+asyncio.run(main())
+```
+
+Notes:
+- Waiting timeout: `await m.execute_tool_in_pool(..., timeout=1.0)` raises `TimeoutError` if no sandbox is available in time.
+- FIFO behavior: pool borrows/returns in FIFO order under load.
+- Errors: even if a tool execution fails, the sandbox is returned to the pool.
+
 ---
 
 ## Sandbox Types & Tool Support
@@ -233,6 +343,10 @@ DockerNotebookConfig(tools_config={'notebook_executor': {}})
 - `network_enabled`: Whether to enable network (Notebook sandbox requires True)
 - `remove_on_exit`: Whether to delete container on exit (default True)
 
+Manager Config (SandboxManagerConfig):
+- `base_url`: If set, HttpSandboxManager is selected automatically
+- `cleanup_interval`: Background cleanup interval in seconds (local manager)
+
 **Example of Installing Additional Dependencies in Sandbox**
 ```python
 async with SandboxFactory.create_sandbox(SandboxType.DOCKER, config) as sandbox:
diff --git a/README_zh.md b/README_zh.md
index d4c330b..d1ed19d 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -95,6 +95,56 @@ asyncio.run(main())
 - 使用 LocalSandboxManager：在本机统一编排多个沙箱的生命周期/清理；适合服务化、多任务并行场景
 - 使用 HttpSandboxManager：通过远程 HTTP 服务统一管理沙箱；适合跨机/分布式或隔离更强的部署
 
+### 0) 管理器工厂：SandboxManagerFactory（自动选择本地/HTTP）
+
+适用场景：
+- 希望用一个入口根据参数自动选择本地或 HTTP 管理器
+- 需要查询已注册的管理器类型，或统一构造逻辑
+
+要点：
+- 显式传入 manager_type 时，按类型创建
+- 当提供 base_url（在 config 或 kwargs）时，创建 HTTP 管理器
+- 两者都未提供时，默认创建本地管理器
+
+示例：通过 base_url 隐式选择 HTTP 管理器
+```python
+import asyncio
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+
+async def main():
+    async with SandboxManagerFactory.create_manager(base_url='http://127.0.0.1:8000') as m:
+        # 与 HttpSandboxManager 用法一致
+        # 例如：创建 DOCKER 沙箱并执行工具
+        # ... 你的代码 ...
+        pass
+
+asyncio.run(main())
+```
+
+示例：显式选择 + 自定义配置
+```python
+import asyncio
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+from ms_enclave.sandbox.model import SandboxManagerConfig, SandboxManagerType
+
+async def main():
+    cfg = SandboxManagerConfig(cleanup_interval=600)
+    async with SandboxManagerFactory.create_manager(
+        manager_type=SandboxManagerType.LOCAL, config=cfg
+    ) as m:
+        # 与 LocalSandboxManager 用法一致
+        # ... 你的代码 ...
+        pass
+
+asyncio.run(main())
+```
+
+查看已注册类型：
+```python
+from ms_enclave.sandbox.manager import SandboxManagerFactory
+print(SandboxManagerFactory.get_registered_types())
+```
+
 ### 1) 直接创建沙箱：SandboxFactory（轻量、临时）
 
 适用场景：
@@ -191,6 +241,66 @@ async def main():
 asyncio.run(main())
 ```
 
+### 4) 沙箱池：预热复用的工作进程（Sandbox Pool）
+
+为何使用：
+- 通过预热固定数量的沙箱，摊销容器启动开销，提高吞吐。
+- 每次执行从池中借出沙箱并在完成后归还；当全部忙碌时按 FIFO 排队。
+
+本地管理示例：
+
+```python
+import asyncio
+from ms_enclave.sandbox.manager import LocalSandboxManager
+from ms_enclave.sandbox.model import DockerSandboxConfig, SandboxType
+
+async def main():
+    async with LocalSandboxManager() as m:
+        cfg = DockerSandboxConfig(
+            image='python:3.11-slim',
+            tools_config={'python_executor': {}}
+        )
+        # 预热 2 个沙箱
+        await m.initialize_pool(pool_size=2, sandbox_type=SandboxType.DOCKER, config=cfg)
+
+        # 多次执行；忙时按 FIFO 排队，执行完成后归还至池中
+        tasks = [
+            m.execute_tool_in_pool('python_executor', {'code': f'print("task {i}")', 'timeout': 30})
+            for i in range(5)
+        ]
+        results = await asyncio.gather(*tasks)
+        print([r.output.strip() for r in results])
+
+        # 查看统计
+        stats = await m.get_stats()
+        print('pool_size =', stats['pool_size'])
+
+asyncio.run(main())
+```
+
+HTTP 管理示例：
+
+```python
+import asyncio
+from ms_enclave.sandbox.manager import HttpSandboxManager
+from ms_enclave.sandbox.model import DockerSandboxConfig, SandboxType
+
+async def main():
+    async with HttpSandboxManager(base_url='http://127.0.0.1:8000') as m:
+        cfg = DockerSandboxConfig(image='python:3.11-slim', tools_config={'python_executor': {}})
+        await m.initialize_pool(pool_size=2, sandbox_type=SandboxType.DOCKER, config=cfg)
+
+        r = await m.execute_tool_in_pool('python_executor', {'code': 'print("hello from pool")', 'timeout': 30})
+        print(r.output)
+
+asyncio.run(main())
+```
+
+说明：
+- 等待超时：`await m.execute_tool_in_pool(..., timeout=1.0)` 若在超时时间内无可用沙箱将抛出 `TimeoutError`。
+- FIFO 行为：在并发负载下，借还顺序遵循 FIFO。
+- 错误处理：即使执行失败，沙箱也会归还至池中。
+
 ---
 
 ## 沙箱类型与工具支持
@@ -235,6 +345,10 @@ DockerNotebookConfig(tools_config={'notebook_executor': {}})
 - `network_enabled`: 是否启用网络（Notebook 沙箱需 True）
 - `remove_on_exit`: 退出后是否删除容器（默认 True）
 
+管理器配置（SandboxManagerConfig）：
+- `base_url`：若设置则自动选择 HttpSandboxManager
+- `cleanup_interval`：本地管理器的后台清理间隔（秒）
+
 **Sandbox中安装额外依赖示例**
 ```python
 async with SandboxFactory.create_sandbox(SandboxType.DOCKER, config) as sandbox:
diff --git a/ms_enclave/sandbox/manager/local_manager.py b/ms_enclave/sandbox/manager/local_manager.py
index 117f47e..5b60a4f 100644
--- a/ms_enclave/sandbox/manager/local_manager.py
+++ b/ms_enclave/sandbox/manager/local_manager.py
@@ -1,10 +1,11 @@
 """Sandbox environment manager."""
 
 import asyncio
-from collections import Counter, deque
+from collections import Counter
 from datetime import datetime, timedelta
 from typing import Any, Dict, List, Optional, Union
 
+from ms_enclave.sandbox.model.constants import DEFAULT_POOL_EXECUTION_TIMEOUT
 from ms_enclave.utils import get_logger
 
 from ..boxes import Sandbox, SandboxFactory
@@ -372,7 +373,6 @@ async def execute_tool_in_pool(
         Args:
             tool_name: Tool name to execute
             parameters: Tool parameters
-            timeout: Optional timeout for waiting for available sandbox
 
         Returns:
             Tool execution result
@@ -387,7 +387,7 @@ async def execute_tool_in_pool(
         if not self._pool_condition:
             raise RuntimeError('Sandbox manager not started')
 
-        timeout = timeout or self.config.timeout
+        timeout = timeout or self.config.timeout or DEFAULT_POOL_EXECUTION_TIMEOUT
 
         async with self._pool_condition:
             # Wait for an available sandbox
diff --git a/ms_enclave/sandbox/model/constants.py b/ms_enclave/sandbox/model/constants.py
new file mode 100644
index 0000000..c880982
--- /dev/null
+++ b/ms_enclave/sandbox/model/constants.py
@@ -0,0 +1 @@
+DEFAULT_POOL_EXECUTION_TIMEOUT = 3600  # 1 hour