diff --git a/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionManager.java b/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionManager.java
index 2da713784..2b0073a49 100644
--- a/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionManager.java
+++ b/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionManager.java
@@ -217,7 +217,8 @@ List<CompletableFuture<StreamObject>> splitWALObjects(List<S3ObjectMetadata> obj
         List<CompletableFuture<StreamObject>> splitFutureList = new ArrayList<>();
         for (Map.Entry<Long, List<StreamDataBlock>> entry : streamDataBlocksMap.entrySet()) {
             List<StreamDataBlock> streamDataBlocks = entry.getValue();
-            for (StreamDataBlock streamDataBlock : streamDataBlocks) {
+            List<StreamDataBlock> mergedStreamDataBlocks = CompactionUtils.mergeStreamDataBlocks(streamDataBlocks);
+            for (StreamDataBlock streamDataBlock : mergedStreamDataBlocks) {
                 CompletableFuture<StreamObject> streamObjectCf = new CompletableFuture<>();
                 splitFutureList.add(streamObjectCf);
                 objectManager.prepareObject(1, TimeUnit.MINUTES.toMillis(30))
diff --git a/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionUtils.java b/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionUtils.java
index fb0c45abc..b2272b420 100644
--- a/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionUtils.java
+++ b/s3stream/src/main/java/com/automq/stream/s3/compact/CompactionUtils.java
@@ -84,4 +84,28 @@ public static Map<Long, List<StreamDataBlock>> blockWaitObjectIndices(List<S3Obj
                 .filter(Objects::nonNull)
                 .collect(Collectors.toMap(AbstractMap.SimpleEntry::getKey, AbstractMap.SimpleEntry::getValue));
     }
+
+    public static List<StreamDataBlock> mergeStreamDataBlocks(List<StreamDataBlock> streamDataBlocks) {
+        List<StreamDataBlock> mergedStreamDataBlocks = new ArrayList<>();
+        StreamDataBlock currStreamDataBlock = null;
+        for (StreamDataBlock streamDataBlock : streamDataBlocks) {
+            if (currStreamDataBlock == null) {
+                currStreamDataBlock = streamDataBlock;
+            } else {
+                if (currStreamDataBlock.getStreamId() == streamDataBlock.getStreamId()
+                        && currStreamDataBlock.getEndOffset() == streamDataBlock.getStartOffset()) {
+                    currStreamDataBlock = new StreamDataBlock(currStreamDataBlock.getStreamId(),
+                            currStreamDataBlock.getStartOffset(), streamDataBlock.getEndOffset(),
+                            currStreamDataBlock.getBlockId(), currStreamDataBlock.getObjectId(),
+                            currStreamDataBlock.getBlockStartPosition(), currStreamDataBlock.getBlockSize() + streamDataBlock.getBlockSize(),
+                            currStreamDataBlock.getRecordCount() + streamDataBlock.getRecordCount());
+                } else {
+                    mergedStreamDataBlocks.add(currStreamDataBlock);
+                    currStreamDataBlock = streamDataBlock;
+                }
+            }
+        }
+        mergedStreamDataBlocks.add(currStreamDataBlock);
+        return mergedStreamDataBlocks;
+    }
 }
diff --git a/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionManagerTest.java b/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionManagerTest.java
index cb2ef20c3..a543a4325 100644
--- a/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionManagerTest.java
+++ b/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionManagerTest.java
@@ -95,25 +95,11 @@ public void testFilterS3Object() {
     @Test
     public void testForceSplit() {
         List<S3ObjectMetadata> s3ObjectMetadata = this.objectManager.getServerObjects().join();
-        List<StreamDataBlock> streamDataBlocks = CompactionUtils.blockWaitObjectIndices(s3ObjectMetadata, s3Operator)
-                .values().stream().flatMap(Collection::stream).collect(Collectors.toList());
         compactionManager = new CompactionManager(config, objectManager, s3Operator);
         List<CompletableFuture<StreamObject>> cfList = compactionManager.splitWALObjects(s3ObjectMetadata);
-        List<StreamObject> streamObjects = cfList.stream().map(CompletableFuture::join).collect(Collectors.toList());
+        List<StreamObject> streamObjects = cfList.stream().map(CompletableFuture::join).toList();
 
-        for (StreamObject streamObject : streamObjects) {
-            StreamDataBlock streamDataBlock = get(streamDataBlocks, streamObject);
-            Assertions.assertNotNull(streamDataBlock);
-            assertEquals(calculateObjectSize(List.of(streamDataBlock)), streamObject.getObjectSize());
-
-            DataBlockReader reader = new DataBlockReader(new S3ObjectMetadata(streamObject.getObjectId(),
-                    streamObject.getObjectSize(), S3ObjectType.STREAM), s3Operator);
-            reader.parseDataBlockIndex();
-            List<StreamDataBlock> streamDataBlocksFromS3 = reader.getDataBlockIndex().join();
-            assertEquals(1, streamDataBlocksFromS3.size());
-            assertEquals(0, streamDataBlocksFromS3.get(0).getBlockStartPosition());
-            assertTrue(contains(streamDataBlocks, streamDataBlocksFromS3.get(0)));
-        }
+        Assertions.assertEquals(7, streamObjects.size());
     }
 
     private StreamDataBlock get(List<StreamDataBlock> streamDataBlocks, StreamObject streamObject) {
diff --git a/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionUtilTest.java b/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionUtilTest.java
index 9f4d6effc..cc3e5f971 100644
--- a/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionUtilTest.java
+++ b/s3stream/src/test/java/com/automq/stream/s3/compact/CompactionUtilTest.java
@@ -50,4 +50,30 @@ public void testBuildObjectStreamRanges() {
         assertEquals(40, result.get(1).getStartOffset());
         assertEquals(150, result.get(1).getEndOffset());
     }
+
+    @Test
+    public void testMergeStreamDataBlocks() {
+        List<StreamDataBlock> streamDataBlocks = List.of(
+                new StreamDataBlock(STREAM_0, 0, 15, 0, 1, 0, 20, 1),
+                new StreamDataBlock(STREAM_0, 15, 30, 1, 1, 20, 5, 1),
+                new StreamDataBlock(STREAM_2, 40, 100, 2, 1, 25, 80, 1),
+                new StreamDataBlock(STREAM_2, 120, 150, 3, 1, 105, 30, 1));
+        List<StreamDataBlock> result = CompactionUtils.mergeStreamDataBlocks(streamDataBlocks);
+        assertEquals(3, result.size());
+        assertEquals(STREAM_0, result.get(0).getStreamId());
+        assertEquals(0, result.get(0).getStartOffset());
+        assertEquals(30, result.get(0).getEndOffset());
+        assertEquals(0, result.get(0).getBlockStartPosition());
+        assertEquals(25, result.get(0).getBlockEndPosition());
+        assertEquals(STREAM_2, result.get(1).getStreamId());
+        assertEquals(40, result.get(1).getStartOffset());
+        assertEquals(100, result.get(1).getEndOffset());
+        assertEquals(25, result.get(1).getBlockStartPosition());
+        assertEquals(105, result.get(1).getBlockEndPosition());
+        assertEquals(STREAM_2, result.get(2).getStreamId());
+        assertEquals(120, result.get(2).getStartOffset());
+        assertEquals(150, result.get(2).getEndOffset());
+        assertEquals(105, result.get(2).getBlockStartPosition());
+        assertEquals(135, result.get(2).getBlockEndPosition());
+    }
 }