diff --git a/contracts/DODOFee/FeeRateDIP3Impl.sol b/contracts/DODOFee/FeeRateDIP3Impl.sol
index f5dcb50..715419b 100644
--- a/contracts/DODOFee/FeeRateDIP3Impl.sol
+++ b/contracts/DODOFee/FeeRateDIP3Impl.sol
@@ -25,6 +25,10 @@ interface IQuota {
     function getUserQuota(address user) external view returns (int);
 }
 
+interface IPoolHeartBeat {
+    function isPoolHeartBeatLive(address pool) external view returns(bool);
+}
+
 interface IPool {
     function version() external pure returns (string memory);
     function _LP_FEE_RATE_() external view returns (uint256);
@@ -47,9 +51,10 @@ contract FeeRateDIP3Impl is InitializableOwnable {
         address quotaAddr;
     }
 
-    mapping(address => CPPoolInfo) cpPools;
+    mapping(address => CPPoolInfo) public cpPools;
     mapping(address => uint256) public specPoolList;
     mapping (address => bool) public isAdminListed;
+    address public poolHeartBeat;
 
     // ============ Events =============
     event AddAdmin(address admin);
@@ -92,6 +97,9 @@ contract FeeRateDIP3Impl is InitializableOwnable {
     function removeAdminList (address userAddr) external onlyOwner {
         isAdminListed[userAddr] = false;
         emit RemoveAdmin(userAddr);
+
+    function setPoolHeartBeat (address newPoolHeartBeat) public onlyOwner {
+        poolHeartBeat = newPoolHeartBeat;
     }
 
     // ============ View Functions ============
@@ -106,6 +114,10 @@ contract FeeRateDIP3Impl is InitializableOwnable {
                 require(!(k==0 && (baseReserve ==0 || quoteReserve == 0)), "KJUDGE_ERROR");
             }
 
+            if (poolHeartBeat != address(0) && !IPoolHeartBeat(poolHeartBeat).isPoolHeartBeatLive(pool)) {
+                return 10**18 - IPool(pool)._LP_FEE_RATE_() - 1;
+            }
+
             if(specPoolList[pool] != 0) {
                 return specPoolList[pool];
             }
diff --git a/contracts/DODOFee/PoolHeartBeat.sol b/contracts/DODOFee/PoolHeartBeat.sol
new file mode 100644
index 0000000..26a31c2
--- /dev/null
+++ b/contracts/DODOFee/PoolHeartBeat.sol
@@ -0,0 +1,46 @@
+/*
+
+    Copyright 2022 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+
+import {InitializableOwnable} from "../lib/InitializableOwnable.sol";
+
+
+contract PoolHeartBeat is InitializableOwnable {
+
+    struct heartBeat {
+        uint256 lastHeartBeat;
+        uint256 maxInterval;
+    }
+    
+    mapping(address => address) public poolHeartBeatManager; // pool => heartbeat manager
+    mapping(address => heartBeat) public beats; // heartbeat manager => heartbeat
+
+    function isPoolHeartBeatLive(address pool) external view returns(bool) {
+        if(poolHeartBeatManager[pool]==address(0)) {
+            return true;
+        }
+        heartBeat memory beat = beats[poolHeartBeatManager[pool]];
+        return block.timestamp - beat.lastHeartBeat < beat.maxInterval;
+    }
+
+    function triggerBeat() external {
+        heartBeat storage beat = beats[msg.sender];
+        beat.lastHeartBeat = block.timestamp;
+    }
+
+    function setBeatInterval(uint256 interval) external {
+        heartBeat storage beat = beats[msg.sender];
+        beat.maxInterval = interval;
+    }
+
+    function bindPoolHeartBeat(address[] memory pools, address manager) external onlyOwner {
+        for(uint256 i=0; i<pools.length; i++) {
+            poolHeartBeatManager[pools[i]] = manager;
+        }
+    }
+}
\ No newline at end of file