diff --git a/client/src/main/java/org/apache/iotdb/tool/ExportCsv.java b/client/src/main/java/org/apache/iotdb/tool/ExportCsv.java
index 702d4b210f36dcd0595ee3b00891d7d69165c2be..7cb55ea123300304dd9f9608b1da248e3627108c 100644
--- a/client/src/main/java/org/apache/iotdb/tool/ExportCsv.java
+++ b/client/src/main/java/org/apache/iotdb/tool/ExportCsv.java
@@ -50,7 +50,6 @@ import org.apache.thrift.TException;
 /**
  * Export CSV file.
  *
- * @author aru cheng
  * @version 1.0.0 20170719
  */
 public class ExportCsv extends AbstractCsvTool {
diff --git a/client/src/main/java/org/apache/iotdb/tool/ImportCsv.java b/client/src/main/java/org/apache/iotdb/tool/ImportCsv.java
index 81669505243556d8915f57b3a96d3b1b17f12850..ac3bac58023561ad02f6a7a174c747cd7864aa4c 100644
--- a/client/src/main/java/org/apache/iotdb/tool/ImportCsv.java
+++ b/client/src/main/java/org/apache/iotdb/tool/ImportCsv.java
@@ -54,8 +54,6 @@ import org.apache.thrift.TException;
 
 /**
  * read a CSV formatted data File and insert all the data into IoTDB.
- *
- * @author zhanggr
  */
 public class ImportCsv extends AbstractCsvTool {
   private static final String FILE_ARGS = "f";
diff --git a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Constant.java b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Constant.java
index 72b08e446f0f4bce539e5f833dbd817998d306c0..7bfda0ebb8e5b54c4dcb55e4f6a9f79e8accb2cd 100644
--- a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Constant.java
+++ b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Constant.java
@@ -20,9 +20,6 @@ package org.apache.iotdb.rocketmq;
 
 import org.apache.iotdb.jdbc.Config;
 
-/**
- * @author lta
- */
 public class Constant {
 
   public static final String TOPIC = "RocketMQ-Test";
diff --git a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQConsumer.java b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQConsumer.java
index c9bcf91ad258afa9ed5025f013b4444a8d40f38d..8b1a766dc2ba0835900d5e17e84be352659ed44a 100644
--- a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQConsumer.java
+++ b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQConsumer.java
@@ -30,9 +30,6 @@ import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/**
- * @author lta
- */
 public class RocketMQConsumer {
 
   private DefaultMQPushConsumer consumer;
diff --git a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQProducer.java b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQProducer.java
index fc44e9511c144d22c188c429ae3cda40c964553c..0a88c924e37510730606ce7ae5e0d8bfe75b308f 100644
--- a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQProducer.java
+++ b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/RocketMQProducer.java
@@ -30,9 +30,6 @@ import java.io.UnsupportedEncodingException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/**
- * @author lta
- */
 public class RocketMQProducer {
 
   private DefaultMQProducer producer;
diff --git a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Utils.java b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Utils.java
index e6b0ad1af0e8710f2ff2eb943dc19372fa3e059b..fe647ffa62a4a2eea68ea005e9f1a89610f0f94f 100644
--- a/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Utils.java
+++ b/example/rocketmq/src/main/java/org/apache/iotdb/rocketmq/Utils.java
@@ -18,9 +18,6 @@
  */
 package org.apache.iotdb.rocketmq;
 
-/**
- * @author lta
- */
 public class Utils {
 
   private Utils() {
diff --git a/server/src/main/java/org/apache/iotdb/db/auth/AuthException.java b/server/src/main/java/org/apache/iotdb/db/auth/AuthException.java
index cd408037ae54fc7a222c0a378b9ad3b24c8f1137..db35f67ff443f858285f2776c91df5c2b37aec4d 100644
--- a/server/src/main/java/org/apache/iotdb/db/auth/AuthException.java
+++ b/server/src/main/java/org/apache/iotdb/db/auth/AuthException.java
@@ -20,8 +20,6 @@ package org.apache.iotdb.db.auth;
 
 /**
  * The exception for authority model.
- *
- * @author liukun
  */
 public class AuthException extends Exception {
 
diff --git a/server/src/main/java/org/apache/iotdb/db/conf/directories/strategy/DirectoryStrategy.java b/server/src/main/java/org/apache/iotdb/db/conf/directories/strategy/DirectoryStrategy.java
index 993d42d7a3051253b5c09629c905593bb31ee3d2..1b66109a104350bf6aee0054580f8e4bf495693a 100644
--- a/server/src/main/java/org/apache/iotdb/db/conf/directories/strategy/DirectoryStrategy.java
+++ b/server/src/main/java/org/apache/iotdb/db/conf/directories/strategy/DirectoryStrategy.java
@@ -27,8 +27,6 @@ import org.slf4j.LoggerFactory;
 /**
  * The basic class of all the strategies of multiple directories. If a user wants to define his own
  * strategy, his strategy has to extend this class and implement the abstract method.
- *
- * @author East
  */
 public abstract class DirectoryStrategy {
 
diff --git a/server/src/main/java/org/apache/iotdb/db/engine/memtable/ChunkBufferPool.java b/server/src/main/java/org/apache/iotdb/db/engine/memtable/ChunkBufferPool.java
index c4f642f0e2e1a28c7f3fd42d296251cb48002751..49c5dd5d3d2ebe61747e9f8c221f18efff725d1d 100644
--- a/server/src/main/java/org/apache/iotdb/db/engine/memtable/ChunkBufferPool.java
+++ b/server/src/main/java/org/apache/iotdb/db/engine/memtable/ChunkBufferPool.java
@@ -28,8 +28,6 @@ import org.slf4j.LoggerFactory;
  * Each flush task allocates new {@linkplain ChunkBuffer} which might be very large and lead to
  * high-cost GC. In new design, we try to reuse ChunkBuffer objects by ChunkBufferPool, referring to
  * {@linkplain MemTablePool}.
- *
- * @author kangrong
  */
 public class ChunkBufferPool {
 
diff --git a/spark-iotdb-connector/src/test/scala/org/apache/iotdb/sparkdb/EnvironmentUtils.java b/spark-iotdb-connector/src/test/scala/org/apache/iotdb/sparkdb/EnvironmentUtils.java
index 9e1f7dea99592142ba4147808fecc656ee20f54d..cdc2a67dcf64b937e61add98178f7478d5575f22 100644
--- a/spark-iotdb-connector/src/test/scala/org/apache/iotdb/sparkdb/EnvironmentUtils.java
+++ b/spark-iotdb-connector/src/test/scala/org/apache/iotdb/sparkdb/EnvironmentUtils.java
@@ -54,9 +54,6 @@ import org.slf4j.LoggerFactory;
  * <p>
  * This class is used for cleaning test environment in unit test and integration test
  * </p>
- *
- * @author liukun
- *
  */
 public class EnvironmentUtils {
   private static String[] creationSqls = new String[]{
diff --git a/tsfile/src/main/java/org/apache/iotdb/tsfile/encoding/encoder/BitmapEncoder.java b/tsfile/src/main/java/org/apache/iotdb/tsfile/encoding/encoder/BitmapEncoder.java
index f106b3dac588b64461a30cca9028eb4abd8c7806..af74d220b3008026298a4a16dca724c54fba27ef 100644
--- a/tsfile/src/main/java/org/apache/iotdb/tsfile/encoding/encoder/BitmapEncoder.java
+++ b/tsfile/src/main/java/org/apache/iotdb/tsfile/encoding/encoder/BitmapEncoder.java
@@ -46,10 +46,7 @@ import org.slf4j.LoggerFactory;
  * </pre>.
 
  * Decode switch or enum values using bitmap, bitmap-encode.{@code <length> <num> <encoded data> }
- * @deprecated This class has been deprecated.
- * @since deprecated since 0.4.0
  */
-@Deprecated
 public class BitmapEncoder extends Encoder {
 
   private static final Logger logger = LoggerFactory.getLogger(BitmapEncoder.class);
diff --git a/tsfile/src/main/java/org/apache/iotdb/tsfile/file/metadata/statistics/Statistics.java b/tsfile/src/main/java/org/apache/iotdb/tsfile/file/metadata/statistics/Statistics.java
index b65e4880b9450718c9598b65f5ab95d37b9cd791..18a40351144ab73db02a0dfcad8a21d8b1b93f1a 100644
--- a/tsfile/src/main/java/org/apache/iotdb/tsfile/file/metadata/statistics/Statistics.java
+++ b/tsfile/src/main/java/org/apache/iotdb/tsfile/file/metadata/statistics/Statistics.java
@@ -38,7 +38,6 @@ import org.slf4j.LoggerFactory;
  * super class.<br>
  *
  * @param <T> data type for Statistics
- * @since 0.0.1
  */
 public abstract class Statistics<T> {