diff --git a/src/storage/blocksstable/ob_tmp_file.cpp b/src/storage/blocksstable/ob_tmp_file.cpp
index 1467c55f8..26811d613 100644
--- a/src/storage/blocksstable/ob_tmp_file.cpp
+++ b/src/storage/blocksstable/ob_tmp_file.cpp
@@ -588,6 +588,7 @@ ObTmpFile::ObTmpFile()
     last_extent_id_(0),
     last_extent_min_offset_(0),
     last_extent_max_offset_(INT64_MAX),
+    extent_idx_lock_(common::ObLatchIds::TMP_FILE_LOCK),
     lock_(common::ObLatchIds::TMP_FILE_LOCK),
     is_inited_(false)
 {
@@ -662,6 +663,26 @@ int64_t ObTmpFile::find_first_extent(const int64_t offset)
   return first_extent;
 }
 
+void ObTmpFile::update_extent_idx_cache(const int64_t last_extent_id,
+                                        const int64_t last_extent_min_offset,
+                                        const int64_t last_extent_max_offset)
+{
+  SpinWLockGuard guard(extent_idx_lock_);
+  last_extent_id_ = last_extent_id;
+  last_extent_min_offset_ = last_extent_min_offset;
+  last_extent_max_offset_ = last_extent_max_offset;
+}
+
+int64_t ObTmpFile::get_extent_idx_from_cache(const int64_t offset) const
+{
+  SpinRLockGuard guard(extent_idx_lock_);
+  int64_t ith_extent = -1;
+  if (offset >= last_extent_min_offset_ && offset < last_extent_max_offset_) {
+    ith_extent = last_extent_id_;
+  }
+  return ith_extent;
+}
+
 int ObTmpFile::aio_read_without_lock(const ObTmpFileIOInfo &io_info,
     int64_t &offset, ObTmpFileIOHandle &handle)
 {
@@ -731,13 +752,11 @@ int ObTmpFile::once_aio_read_batch_without_lock(
   char *buf = io_info.buf_ + handle.get_data_size();
   int64_t remain_size = io_info.size_ - handle.get_data_size();
   int64_t read_size = 0;
-  int64_t ith_extent = 0;
   ObTmpFileExtent *tmp = nullptr;
   common::ObIArray<ObTmpFileExtent *> &extents = file_meta_.get_extents();
 
-  if (offset >= last_extent_min_offset_ && offset_ <= last_extent_max_offset_) {
-    ith_extent = last_extent_id_;
-  } else {
+  int64_t ith_extent = get_extent_idx_from_cache(offset);
+  if (OB_UNLIKELY(-1 == ith_extent)) {
     ith_extent = find_first_extent(offset);
   }
 
@@ -761,13 +780,14 @@ int ObTmpFile::once_aio_read_batch_without_lock(
         buf += read_size;
         one_batch_read_size += read_size;
         handle.add_data_size(read_size);
-        last_extent_id_ = ith_extent;
-        last_extent_min_offset_ = tmp->get_global_start();
-        last_extent_max_offset_ = tmp->get_global_end();
       }
     }
     ++ith_extent;
   }
+
+  if (OB_SUCC(ret) && OB_NOT_NULL(tmp) && OB_LIKELY(ith_extent > 0)) {
+      update_extent_idx_cache(ith_extent - 1, tmp->get_global_start(), tmp->get_global_end());
+  }
   return ret;
 }
 
diff --git a/src/storage/blocksstable/ob_tmp_file.h b/src/storage/blocksstable/ob_tmp_file.h
index af434158f..3c7301195 100644
--- a/src/storage/blocksstable/ob_tmp_file.h
+++ b/src/storage/blocksstable/ob_tmp_file.h
@@ -269,6 +269,10 @@ private:
   int64_t small_file_prealloc_size();
   int64_t big_file_prealloc_size();
   int64_t find_first_extent(const int64_t offset);
+  void update_extent_idx_cache(const int64_t last_extent_id,
+                               const int64_t last_extent_min_offset,
+                               const int64_t last_extent_max_offset);
+  int64_t get_extent_idx_from_cache(const int64_t offset) const;
 
 private:
   // NOTE:
@@ -286,6 +290,7 @@ private:
   int64_t last_extent_id_;
   int64_t last_extent_min_offset_;
   int64_t last_extent_max_offset_;
+  common::SpinRWLock extent_idx_lock_;
   common::SpinRWLock lock_;
   bool is_inited_;