diff --git a/xcli_core/cli_base.py b/xcli_core/cli_base.py
index 4936e91..61d61b9 100644
--- a/xcli_core/cli_base.py
+++ b/xcli_core/cli_base.py
@@ -72,6 +72,10 @@ class BaseAICLI:
         if self.current_engine:
             self.current_engine.cli = self  # 设置引用以便访问插件
 
+        # 初始化安全层
+        from .safety import get_safety
+        get_safety().set_cli(self)
+
         # 创建聊天记录目录
         self.chat_history_dir = os.path.join(project_dir, "chat_history")
         if not os.path.exists(self.chat_history_dir):
diff --git a/xcli_core/cli_core.py b/xcli_core/cli_core.py
index b8c8be0..f5e224c 100644
--- a/xcli_core/cli_core.py
+++ b/xcli_core/cli_core.py
@@ -11,6 +11,7 @@ from colorama import Fore, Style
 from .constants import TEXTUAL_AVAILABLE, LOVE_FILE_PATH, DEFAULT_MAX_HISTORY
 from .config import get_system_config, logger
 from .cli_base import BaseAICLI
+from .safety import get_safety, MODE_UNRESTRICTED, MODE_NORMAL, MODE_MANUAL
 from .cli_clawli import ClawliMixin
 from .cli_tools import ToolMixin
 from .cli_code_exec import CodeExecMixin
@@ -721,6 +722,7 @@ multi 操作支持一次修改多处：
         print(f"{Fore.GREEN}输入 '/tui' 切换到 TUI 模式{Style.RESET_ALL}")
         print(f"{Fore.GREEN}输入 '/engine list' 查看可用AI引擎{Style.RESET_ALL}")
         print(f"{Fore.GREEN}输入 '/engine switch <引擎名>' 切换AI引擎{Style.RESET_ALL}")
+        print(f"{Fore.GREEN}输入 '/safe' 切换安全模式 (普通→人工→无限制){Style.RESET_ALL}")
         print(f"{Fore.GREEN}输入 '/file.read <文件名> [行数]' 直接读取文件内容{Style.RESET_ALL}")
         print(f"{Fore.GREEN}输入 '@文件路径' 自动读取文件内容并发送给AI{Style.RESET_ALL}")
         print(f"{Fore.GREEN}输入 '@图片路径' 自动分析图片并发送描述给AI{Style.RESET_ALL}")
@@ -833,6 +835,29 @@ multi 操作支持一次修改多处：
                     print(f"{Fore.CYAN}已从 TUI 模式返回 CLI 模式{Style.RESET_ALL}")
                     continue
 
+                if user_input.startswith('/safe'):
+                    parts = user_input.split()
+                    safety = get_safety()
+                    if len(parts) > 1:
+                        mode_arg = parts[1].lower()
+                        if mode_arg in ('off', 'unrestricted', '无限制'):
+                            safety.set_mode(MODE_UNRESTRICTED)
+                        elif mode_arg in ('on', 'normal', '普通'):
+                            safety.set_mode(MODE_NORMAL)
+                        elif mode_arg in ('manual', '人工', 'all'):
+                            safety.set_mode(MODE_MANUAL)
+                        else:
+                            print(f"{Fore.RED}用法: /safe [off|on|manual]{Style.RESET_ALL}")
+                            continue
+                    else:
+                        # 无参数：循环切换
+                        safety.cycle_mode()
+                    mode_name = safety.get_mode_name()
+                    icons = {"无限制": "🔴", "普通": "🟢", "人工确认": "🟡"}
+                    icon = icons.get(mode_name, "⚪")
+                    print(f"{icon} 安全模式: {mode_name}")
+                    continue
+
                 if user_input.startswith('/'):
                     command_parts = user_input[1:].split(' ', 1)
                     command = command_parts[0]
diff --git a/xcli_core/cli_tools.py b/xcli_core/cli_tools.py
index 544f715..26d512c 100644
--- a/xcli_core/cli_tools.py
+++ b/xcli_core/cli_tools.py
@@ -6,6 +6,7 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 from colorama import Fore, Style
 
 from .constants import UNIFIED_TOOL_MANAGER_AVAILABLE
+from .safety import get_safety
 
 
 class ToolMixin:
@@ -93,6 +94,12 @@ class ToolMixin:
             args = tool_call_data.get('args', '')
             arguments = tool_call_data.get('arguments')
 
+            # ── 安全检查 ──
+            safety = get_safety()
+            allowed, msg = safety.check(tool_name, str(args))
+            if not allowed:
+                return {"result": f"🚫 已取消: {msg}"}
+
             if UNIFIED_TOOL_MANAGER_AVAILABLE and hasattr(self.liugin_manager, 'execute'):
                 if arguments and isinstance(arguments, dict):
                     result = self.liugin_manager.execute(tool_name, args, **arguments)
diff --git a/xcli_core/safety.py b/xcli_core/safety.py
new file mode 100644
index 0000000..f21eeed
--- /dev/null
+++ b/xcli_core/safety.py
@@ -0,0 +1,292 @@
+"""
+安全层 - 统一的指令安全检查
+拦截所有工具调用，通过 AI 识别风险并请求用户确认
+"""
+import json
+import threading
+from typing import Optional, Tuple
+
+
+# ── 安全模式 ──
+MODE_UNRESTRICTED = 0   # 无限制：直接执行
+MODE_NORMAL = 1          # 普通：AI 识别风险
+MODE_MANUAL = 2          # 人工：所有指令都确认
+
+MODE_NAMES = {
+    MODE_UNRESTRICTED: "无限制",
+    MODE_NORMAL: "普通",
+    MODE_MANUAL: "人工确认",
+}
+
+# ── 始终需要人工确认的指令（无论模式） ──
+ALWAYS_CONFIRM = {
+    ("cmd_executor", "run rm"),
+    ("cmd_executor", "run chmod"),
+    ("cmd_executor", "run chown"),
+    ("file_manager", "delete"),
+    ("git_tools", "checkout -b"),
+}
+
+
+class SafetyLayer:
+    """统一安全检查层"""
+
+    def __init__(self):
+        self.mode = MODE_NORMAL
+        self.cli = None
+        self._analysis_cache = {}  # 缓存分析结果
+        self._lock = threading.Lock()
+
+    def set_cli(self, cli):
+        self.cli = cli
+
+    def get_mode(self) -> int:
+        return self.mode
+
+    def get_mode_name(self) -> str:
+        return MODE_NAMES.get(self.mode, "未知")
+
+    def set_mode(self, mode: int):
+        self.mode = mode
+
+    def cycle_mode(self) -> str:
+        """切换到下一个模式，返回新模式名称"""
+        self.mode = (self.mode + 1) % 3
+        return self.get_mode_name()
+
+    # ── 核心：拦截检查 ──
+
+    def check(self, tool_name: str, tool_args: str) -> Tuple[bool, str]:
+        """
+        检查工具调用是否安全
+        返回: (允许执行, 消息)
+        """
+        # 无限制模式：直接放行
+        if self.mode == MODE_UNRESTRICTED:
+            return True, ""
+
+        # 检查是否是始终需要确认的指令
+        args_lower = tool_args.strip().lower()
+        for (t, pattern) in ALWAYS_CONFIRM:
+            if tool_name == t and args_lower.startswith(pattern.split(" ", 1)[1] if " " in pattern else ""):
+                return self._ask_user_confirm(
+                    tool_name, tool_args,
+                    risk_level="高",
+                    impact="此操作始终需要人工确认",
+                    reason="敏感指令"
+                )
+
+        # 人工确认模式：所有指令都确认
+        if self.mode == MODE_MANUAL:
+            return self._ask_user_confirm(
+                tool_name, tool_args,
+                risk_level="中",
+                impact="当前为人工确认模式，所有指令需要确认",
+                reason="模式要求"
+            )
+
+        # 普通模式：AI 识别风险
+        return self._ai_analyze(tool_name, tool_args)
+
+    # ── AI 风险识别 ──
+
+    def _ai_analyze(self, tool_name: str, tool_args: str) -> Tuple[bool, str]:
+        """使用当前引擎独立分析指令风险（不带历史对话）"""
+        # 快速预检：明显安全的指令直接放行
+        if self._is_quick_safe(tool_name, tool_args):
+            return True, ""
+
+        # 获取引擎
+        engine = None
+        if self.cli and hasattr(self.cli, 'current_engine'):
+            engine = self.cli.current_engine
+
+        if not engine:
+            # 无引擎时降级为人工确认
+            return self._ask_user_confirm(
+                tool_name, tool_args,
+                risk_level="未知",
+                impact="无法进行 AI 风险分析",
+                reason="无可用引擎"
+            )
+
+        # 检查缓存
+        cache_key = f"{tool_name}:{tool_args[:100]}"
+        with self._lock:
+            if cache_key in self._analysis_cache:
+                cached = self._analysis_cache[cache_key]
+                if cached["safe"]:
+                    return True, ""
+                return self._ask_user_confirm(
+                    tool_name, tool_args,
+                    risk_level=cached["level"],
+                    impact=cached["impact"],
+                    reason=cached["reason"]
+                )
+
+        # 调用 AI 独立分析（不带任何历史对话）
+        analysis_prompt = f"""你是一个安全分析器。分析以下工具调用是否存在安全风险。
+
+工具: {tool_name}
+参数: {tool_args}
+
+只返回以下 JSON（不要其他内容）:
+{{"safe": true/false, "level": "低/中/高", "reason": "风险原因", "impact": "执行后可能的影响"}}
+
+判断标准:
+- safe=true: 读取操作、查看信息、无害查询
+- safe=false: 删除文件、执行系统命令、修改配置、网络请求、git 危险操作
+- level 低: 只读操作但可能泄露信息
+- level 中: 修改操作可撤销
+- level 高: 不可逆操作、系统级操作"""
+
+        try:
+            response = engine.generate_response(analysis_prompt, system_prompt="你是安全分析器。只返回 JSON，不要其他内容。")
+
+            if not response:
+                return self._ask_user_confirm(
+                    tool_name, tool_args,
+                    risk_level="未知",
+                    impact="AI 分析无响应",
+                    reason="引擎未返回结果"
+                )
+
+            # 解析 JSON
+            result = self._parse_analysis(response)
+
+            if result and result.get("safe") is True:
+                # 缓存安全结果
+                with self._lock:
+                    self._analysis_cache[cache_key] = result
+                return True, ""
+
+            # 不安全，请求用户确认
+            level = result.get("level", "中") if result else "未知"
+            reason = result.get("reason", "AI 识别到潜在风险") if result else "AI 分析失败"
+            impact = result.get("impact", "未知影响") if result else "未知影响"
+
+            return self._ask_user_confirm(
+                tool_name, tool_args,
+                risk_level=level,
+                impact=impact,
+                reason=reason
+            )
+
+        except Exception as e:
+            return self._ask_user_confirm(
+                tool_name, tool_args,
+                risk_level="未知",
+                impact=f"AI 分析异常: {e}",
+                reason="分析过程出错"
+            )
+
+    def _parse_analysis(self, response: str) -> Optional[dict]:
+        """解析 AI 返回的分析结果"""
+        import re
+
+        # 尝试直接解析 JSON
+        response = response.strip()
+
+        # 去掉 markdown 代码块
+        if response.startswith("```"):
+            response = response.split("\n", 1)[-1] if "\n" in response else response[3:]
+        if response.endswith("```"):
+            response = response[:-3]
+        response = response.strip()
+
+        try:
+            return json.loads(response)
+        except json.JSONDecodeError:
+            pass
+
+        # 尝试从文本中提取 JSON
+        match = re.search(r'\{[^{}]*"safe"[^{}]*\}', response)
+        if match:
+            try:
+                return json.loads(match.group())
+            except json.JSONDecodeError:
+                pass
+
+        return None
+
+    def _is_quick_safe(self, tool_name: str, tool_args: str) -> bool:
+        """快速预检：明显安全的操作直接放行"""
+        args = tool_args.strip().lower()
+
+        # 纯读取操作
+        safe_patterns = {
+            "code_editor": ["read_range", "find ", "regex ", "symbols", "imports",
+                            "ast_info", "stats", "structure", "context", "todo",
+                            "callers", "diff ", "diff_text"],
+            "git_tools": ["status", "log", "diff", "branch", "remote", "show",
+                          "blame", "contributors", "summary"],
+            "file_manager": ["list", "read", "info", "search"],
+            "cmd_executor": [],  # 命令执行不跳过
+            "auto_engineer": ["metrics", "security", "complexity", "duplicates",
+                              "suggest", "info"],
+            "task_manager": ["list"],
+            "browser_auto": ["status", "title", "url", "text", "html", "attr",
+                             "value", "eval", "query", "cookies"],
+            "sub_agent": ["list", "status", "result", "stats"],
+            "network_tools": ["ping", "status", "headers", "ip"],
+            "tool_search": [],
+        }
+
+        patterns = safe_patterns.get(tool_name, [])
+        for p in patterns:
+            if args.startswith(p):
+                return True
+
+        return False
+
+    # ── 用户交互 ──
+
+    def _ask_user_confirm(self, tool_name: str, tool_args: str,
+                          risk_level: str = "中", impact: str = "",
+                          reason: str = "") -> Tuple[bool, str]:
+        """向用户展示风险信息并请求确认"""
+        from colorama import Fore, Style
+
+        # 风险等级颜色
+        level_colors = {
+            "低": Fore.YELLOW,
+            "中": Fore.LIGHTYELLOW_EX,
+            "高": Fore.RED,
+            "未知": Fore.LIGHTBLACK_EX,
+        }
+        level_color = level_colors.get(risk_level, Fore.YELLOW)
+
+        # 截断过长的参数
+        display_args = tool_args
+        if len(display_args) > 200:
+            display_args = display_args[:200] + "..."
+
+        print()
+        print(f"  {Fore.RED}{'═' * 50}{Style.RESET_ALL}")
+        print(f"  {Fore.RED}⚠️  安全检查{Style.RESET_ALL}")
+        print(f"  {Fore.RED}{'═' * 50}{Style.RESET_ALL}")
+        print(f"  {Fore.CYAN}工具:{Style.RESET_ALL} {tool_name}")
+        print(f"  {Fore.CYAN}指令:{Style.RESET_ALL} {display_args}")
+        print(f"  {level_color}风险:{Style.RESET_ALL} {risk_level}")
+        if reason:
+            print(f"  {Fore.YELLOW}原因:{Style.RESET_ALL} {reason}")
+        if impact:
+            print(f"  {Fore.YELLOW}影响:{Style.RESET_ALL} {impact}")
+        print(f"  {Fore.RED}{'─' * 50}{Style.RESET_ALL}")
+
+        try:
+            choice = input(f"  {Fore.WHITE}是否执行? (y/n): {Style.RESET_ALL}").strip().lower()
+            if choice in ('y', 'yes', '是'):
+                return True, "用户确认执行"
+            else:
+                return False, "用户取消执行"
+        except (KeyboardInterrupt, EOFError):
+            print()
+            return False, "用户中断"
+
+
+# ── 全局单例 ──
+_safety = SafetyLayer()
+
+def get_safety() -> SafetyLayer:
+    return _safety