diff --git a/vnpy/app/risk_manager/engine.py b/vnpy/app/risk_manager/engine.py
new file mode 100644
index 00000000..981baf12
--- /dev/null
+++ b/vnpy/app/risk_manager/engine.py
@@ -0,0 +1,184 @@
+""""""
+from collections import defaultdict
+from vnpy.trader.object import OrderRequest
+from vnpy.event import Event, EventEngine, EVENT_TIMER
+from vnpy.trader.engine import BaseEngine, MainEngine
+from vnpy.trader.event import EVENT_TRADE, EVENT_ORDER, EVENT_LOG
+from vnpy.trader.constant import Status
+from vnpy.trader.utility import load_json, save_json
+
+
+APP_NAME = "RiskManager"
+
+
+class RiskManagerEngine(BaseEngine):
+    """风控引擎"""
+    setting_filename = "risk_manager_setting.json"
+    
+    def __init__(self, main_engine: MainEngine, event_engine: EventEngine):
+        """"""
+        self.main_engine = main_engine
+        self.event_engine = event_engine
+        main_engine.rmEngine = self
+
+        self.active = False
+        self.order_flow_count = 0    
+        self.order_flow_limit = 50     
+        self.order_flow_clear = 1     
+        self.order_flow_timer = 0    
+        self.order_size_limit = 100   
+        self.trade_count = 0      
+        self.trade_limit = 1000         
+        self.order_cancel_limit = 10  
+        self.order_cancel_counts = defaultdict(int)          
+        self.active_order_limit = 20  
+        
+        self.load_setting()
+        self.registerEvent()
+  
+    def load_setting(self):
+        """"""
+        setting = load_json(self.setting_filename)
+
+        self.active = setting["active"]
+        self.order_flow_limit = setting["order_flow_limit"]
+        self.order_flow_clear = setting["order_flow_clear"]
+        self.order_size_limit = setting["order_size_limit"]
+        self.trade_limit = setting["trade_limit"]
+        self.active_order_limit = setting["active_order_limit"]
+        self.order_cancel_limit = setting["order_cancel_limit"]            
+   
+    def save_setting(self):
+        """"""
+        setting = {
+            "active": self.active,
+            "order_flow_limit": self.order_flow_limit,
+            "order_flow_clear": self.order_flow_clear,
+            "order_size_limit": self.order_size_limit,
+            "trade_limit": self.trade_limit,
+            "active_order_limit": self.active_order_limit,
+            "order_cancel_limit": self.order_cancel_limit,
+        }
+
+        save_json(self.setting_filename, setting)
+   
+    def register_event(self):
+        """"""
+        self.event_engine.register(EVENT_TRADE, self.process_trade_event)
+        self.event_engine.register(EVENT_TIMER, self.process_timer_event)
+        self.event_engine.register(EVENT_ORDER, self.process_order_event)
+            
+    def process_order_event(self, event: Event):
+        """"""
+        order = event.data
+        if order.status != Status.CANCELLED:
+            return       
+        self.order_cancel_counts[order.symbol] += 1
+   
+    def process_trade_event(self, event: Event):
+        """"""
+        trade = event.data
+        self.trade_count += trade.volume
+    
+    def process_timer_event(self, event: Event):
+        """"""
+        self.order_flow_timer += 1
+
+        if self.order_flow_timer >= self.order_flow_clear:
+            self.order_flow_count = 0
+            self.order_flow_timer = 0
+   
+    def write_risk_log(self, msg: str):
+        """"""        
+        event = Event(
+            EVENT_LOG,
+            msg
+        )
+        self.event_engine.put(event)
+
+    def check_risk(self, req: OrderRequest, gateway_name: str):
+        """"""
+        if not self.active:
+            return True
+
+        # Check order volume
+        if req.volume <= 0:
+            self.write_risk_log("委托数量必须大于0")
+            return False
+        
+        if req.volume > self.order_size_limit:
+            self.write_risk_log(f"单笔委托数量{req.volume}，超过限制{self.order_size_limit}")
+            return False
+
+        # Check trade volume
+        if self.trade_count >= self.trade_limit:
+            self.write_risk_log(f"今日总成交合约数量{self.trade_count}，超过限制{self.trade_limit}")
+            return False
+
+        # Check flow count
+        if self.order_flow_count >= self.order_flow_limit:
+            self.write_risk_log(f"委托流数量{self.order_flow_count}，超过限制每{self.order_flow_clear}秒{self.order_flow_limit}")
+            return False
+
+        # Check all active orders
+        active_order_count = len(self.main_engine.get_all_active_orders())
+        if active_order_count >= self.active_order_limit:
+            self.write_risk_log(f"当前活动委托数量{active_order_count}，超过限制{self.active_order_limit}")
+            return False
+
+        # Check order cancel counts
+        if req.symbol in self.order_cancel_counts and self.order_cancel_counts[req.symbol] >= self.order_cancel_limit:
+            self.write_risk_log(f"当日{req.symbol}撤单次数{self.order_cancel_counts[req.symbol]}，超过限制{self.order_cancel_limit}")
+            return False
+
+        # Add flow count if pass all checks
+        self.order_flow_count += 1
+        return True
+    
+    def clear_order_flow_count(self):
+        """"""
+        self.order_flow_count = 0
+        self.write_risk_log("清空流控计数")
+    
+    def clear_trade_count(self):
+        """"""
+        self.trade_count = 0
+        self.write_risk_log("清空总成交计数")
+   
+    def set_order_flow_limit(self, n):
+        """"""
+        self.order_flow_limit = n
+   
+    def set_order_flow_clear(self, n):
+        """"""
+        self.order_flow_clear = n
+    
+    def set_order_size_limit(self, n):
+        """"""
+        self.order_size_limit = n
+   
+    def set_trade_limit(self, n):
+        """"""
+        self.trade_limit = n
+   
+    def set_active_order_limit(self, n):
+        """"""
+        self.active_order_limit = n
+   
+    def set_order_cancel_limit(self, n):
+        """"""
+        self.order_cancel_limit = n
+    
+    def switch_engine_status(self):
+        """"""
+        self.active = not self.active
+
+        if self.active:
+            self.write_risk_log("风险管理功能启动")
+        else:
+            self.write_risk_log("风险管理功能停止")
+                
+    def stop(self):
+        """"""
+        self.save_setting()
+