diff --git a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/StorageChainController.java b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/StorageChainController.java
index 4887010e2c570abb216c82aa3e29599d51a4b128..c0bd423fdff5318c01aaa82180f5123315eee626 100644
--- a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/StorageChainController.java
+++ b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/StorageChainController.java
@@ -1,19 +1,19 @@
 package com.ai.cloud.skywalking.reciever.storage;
 
+import static com.ai.cloud.skywalking.reciever.conf.Config.StorageChain.STORAGE_TYPE;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
 import com.ai.cloud.skywalking.protocol.Span;
 import com.ai.cloud.skywalking.reciever.conf.Constants;
 import com.ai.cloud.skywalking.reciever.selfexamination.ServerHealthCollector;
 import com.ai.cloud.skywalking.reciever.selfexamination.ServerHeathReading;
 import com.ai.cloud.skywalking.reciever.storage.chain.AlarmChain;
 import com.ai.cloud.skywalking.reciever.storage.chain.SaveToHBaseChain;
-import com.ai.cloud.skywalking.reciever.storage.chain.SaveToMySQLChain;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import static com.ai.cloud.skywalking.reciever.conf.Config.StorageChain.STORAGE_TYPE;
 
 public class StorageChainController {
     private static Logger logger = LogManager
@@ -25,8 +25,6 @@ public class StorageChainController {
         if (STORAGE_TYPE.equalsIgnoreCase("hbase")) {
             chainArray.add(new AlarmChain());
             chainArray.add(new SaveToHBaseChain());
-        } else if (STORAGE_TYPE.equalsIgnoreCase("mysql")) {
-            chainArray.add(new SaveToMySQLChain());
         } else {
             throw new RuntimeException("illegal storage type.");
         }
diff --git a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/chain/SaveToMySQLChain.java b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/chain/SaveToMySQLChain.java
deleted file mode 100644
index 8bd832bbf3e4d99692b7c11f928172b01f932195..0000000000000000000000000000000000000000
--- a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/chain/SaveToMySQLChain.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.ai.cloud.skywalking.reciever.storage.chain;
-
-import com.ai.cloud.skywalking.protocol.Span;
-import com.ai.cloud.skywalking.reciever.storage.Chain;
-import com.ai.cloud.skywalking.reciever.storage.IStorageChain;
-
-import java.util.List;
-
-public class SaveToMySQLChain implements IStorageChain {
-
-    @Override
-    public void doChain(List<Span> entry, Chain chain) {
-        // TODO Auto-generated method stub
-
-    }
-
-}