diff --git a/common_components/common_runtime/src/heap/allocator/alloc_buffer.h b/common_components/common_runtime/src/heap/allocator/alloc_buffer.h
index 7d7c6871cc3b1f7182708280090ed68fcd152c40..6090987677ddcb0aeb7f55d5b399fe9e253945d1 100755
--- a/common_components/common_runtime/src/heap/allocator/alloc_buffer.h
+++ b/common_components/common_runtime/src/heap/allocator/alloc_buffer.h
@@ -41,6 +41,7 @@ public:
         }
         DLOG(REGION, "AllocBuffer clear tlRegion %p@%#zx+%zu",
             tlRegion_, tlRegion_->GetRegionStart(), tlRegion_->GetRegionAllocatedSize());
+        tlRegion_->UnlinkExternalTLAB();
         tlRegion_ = RegionDesc::NullRegion();
     }
     void RefershRegion();
diff --git a/common_components/common_runtime/src/heap/allocator/region_desc.h b/common_components/common_runtime/src/heap/allocator/region_desc.h
index 9d419ce7d2ba38839d30fc7a8bca88d5805852a3..360e68ab7f05e2d37b3bd18539b6c27cbac7c0c9 100755
--- a/common_components/common_runtime/src/heap/allocator/region_desc.h
+++ b/common_components/common_runtime/src/heap/allocator/region_desc.h
@@ -106,6 +106,7 @@ public:
         metadata.freeSlot = nullptr;
         metadata.regionEnd = reinterpret_cast<uintptr_t>(nullptr);
         metadata.toSpaceRegion = false;
+        metadata.linkedExternalTlab = false;
     }
     static inline RegionDesc* NullRegion()
     {
@@ -480,6 +481,10 @@ public:
         }
     }
 
+    uintptr_t GetRegionMeta() {
+        return reinterpret_cast<uintptr_t>(&metadata);
+    }
+
     static void InitFreeRegion(size_t unitIdx, size_t nUnit)
     {
         RegionDesc* region = reinterpret_cast<RegionDesc*>(RegionDesc::UnitInfo::GetUnitInfo(unitIdx));
@@ -895,6 +900,14 @@ public:
         metadata.prevRegionIdx = static_cast<uint32_t>(prevIdx);
     }
 
+    void LinkExternalTLAB() {
+        metadata.linkedExternalTlab = true;
+    }
+
+    void UnlinkExternalTLAB() {
+        metadata.linkedExternalTlab = false;
+    }
+
     RegionDesc* GetNextRegion() const
     {
         if (UNLIKELY_CC(metadata.nextRegionIdx == NULLPTR_IDX)) {
@@ -1008,6 +1021,7 @@ private:
 
             uint32_t liveByteCount;
             int32_t rawPointerObjectCount;
+            bool linkedExternalTlab;
         };
 
         union {
@@ -1149,6 +1163,7 @@ private:
         metadata.liveByteCount = 0;
         metadata.liveInfo = nullptr;
         metadata.freeSlot = nullptr;
+        metadata.linkedExternalTlab = false;
         SetRegionType(RegionType::FREE_REGION);
         SetUnitRole(uClass);
         ClearTraceCopyFixLine();
diff --git a/common_components/common_runtime/src/heap/allocator/region_manager.cpp b/common_components/common_runtime/src/heap/allocator/region_manager.cpp
index 8e16ab0b3dc86bb3fbb0e7dfa8128e720ed43936..5cd4fd3e684c2227d0f2ad6c4aff7a7c8969b0f5 100755
--- a/common_components/common_runtime/src/heap/allocator/region_manager.cpp
+++ b/common_components/common_runtime/src/heap/allocator/region_manager.cpp
@@ -700,6 +700,20 @@ uintptr_t RegionManager::AllocRegion()
     return start;
 }
 
+uintptr_t RegionManager::AllocBufferRegion()
+{
+    AllocationBuffer* allocBuffer = AllocationBuffer::GetOrCreateAllocBuffer();
+    RegionDesc* region = AllocateThreadLocalRegion();
+    if (UNLIKELY_CC(region == nullptr)) {
+        return RegionDesc::NullRegion()->GetRegionMeta();
+    }
+
+    allocBuffer->SetRegion(region);
+    region->LinkExternalTLAB();
+
+    return region->GetRegionMeta();
+}
+
 uintptr_t RegionManager::AllocPinnedRegion()
 {
     RegionDesc* region = TakeRegion(maxUnitCountPerRegion_, RegionDesc::UnitRole::SMALL_SIZED_UNITS, false, false);
diff --git a/common_components/common_runtime/src/heap/allocator/region_manager.h b/common_components/common_runtime/src/heap/allocator/region_manager.h
index 5a43e0dee064be2f40555e5146643c3f99ac0619..a9e9f7194cea9c91d91514439b3a8ff23d0cf77c 100755
--- a/common_components/common_runtime/src/heap/allocator/region_manager.h
+++ b/common_components/common_runtime/src/heap/allocator/region_manager.h
@@ -140,6 +140,7 @@ public:
     // only used for deserialize allocation, allocate one region and regard it as full region
     // adapt for concurrent gc
     uintptr_t AllocRegion();
+    uintptr_t AllocBufferRegion();
     uintptr_t AllocPinnedRegion();
     uintptr_t AllocLargeRegion(size_t size);
     uintptr_t AllocJitFortRegion(size_t size);
diff --git a/common_components/common_runtime/src/heap/allocator/region_space.cpp b/common_components/common_runtime/src/heap/allocator/region_space.cpp
index 1b77acac44feca0c00aa0ce97d1defcff2eb904a..20c5c94410d7e5951d8efa8daf078e4bf0e1a0ca 100755
--- a/common_components/common_runtime/src/heap/allocator/region_space.cpp
+++ b/common_components/common_runtime/src/heap/allocator/region_space.cpp
@@ -194,6 +194,7 @@ AllocationBuffer::~AllocationBuffer()
         RegionSpace& theAllocator = reinterpret_cast<RegionSpace&>(Heap::GetHeap().GetAllocator());
         RegionManager& manager = theAllocator.GetRegionManager();
         manager.RemoveThreadLocalRegion(tlRegion_);
+        tlRegion_->UnlinkExternalTLAB();
         manager.EnlistFullThreadLocalRegion(tlRegion_);
         tlRegion_ = RegionDesc::NullRegion();
     }
@@ -263,6 +264,7 @@ HeapAddress AllocationBuffer::AllocateImpl(size_t totalSize, AllocType allocType
         // allocation failed because region is full.
         if (tlRegion_->IsThreadLocalRegion()) {
             manager.RemoveThreadLocalRegion(tlRegion_);
+            tlRegion_->UnlinkExternalTLAB();
             manager.EnlistFullThreadLocalRegion(tlRegion_);
             tlRegion_ = RegionDesc::NullRegion();
         }
diff --git a/common_components/heap/heap_allocator.cpp b/common_components/heap/heap_allocator.cpp
index ac7f0cd0e044957690d64a14629c49b42d933b74..ccf97f084d33eb3e4d664f96254f65b53a7d9429 100755
--- a/common_components/heap/heap_allocator.cpp
+++ b/common_components/heap/heap_allocator.cpp
@@ -81,6 +81,12 @@ Address HeapAllocator::AllocateRegion()
     return manager.AllocRegion();
 }
 
+Address HeapAllocator::AllocateRegionBuffer()
+{
+    RegionManager& manager = reinterpret_cast<RegionSpace&>(Heap::GetHeap().GetAllocator()).GetRegionManager();
+    return manager.AllocBufferRegion();
+}
+
 Address HeapAllocator::AllocatePinnedRegion()
 {
     RegionManager& manager = reinterpret_cast<RegionSpace&>(Heap::GetHeap().GetAllocator()).GetRegionManager();