diff --git a/paddle/fluid/memory/allocation/npu_pinned_allocator.cc b/paddle/fluid/memory/allocation/npu_pinned_allocator.cc
index 507a8589d94ddd1adf925aa5e01c787439624c62..9178825efa9e1da0ad43fee13f5f64d992f91cd9 100644
--- a/paddle/fluid/memory/allocation/npu_pinned_allocator.cc
+++ b/paddle/fluid/memory/allocation/npu_pinned_allocator.cc
@@ -39,6 +39,7 @@ void NPUPinnedAllocator::ProcessEventsAndFree() {
 }
 
 Allocation *NPUPinnedAllocator::AllocateImpl(size_t size) {
+  std::lock_guard<std::mutex> lock(mtx_);
   ProcessEventsAndFree();
   void *ptr;
   int error = posix_memalign(&ptr, kAlignment, size);
@@ -50,6 +51,7 @@ Allocation *NPUPinnedAllocator::AllocateImpl(size_t size) {
 }
 
 void NPUPinnedAllocator::FreeImpl(Allocation *allocation) {
+  std::lock_guard<std::mutex> lock(mtx_);
   void *ptr = allocation->ptr();
   auto iter = npu_events_.find(allocation);
   aclrtEvent event = iter->second;
@@ -65,11 +67,14 @@ void NPUPinnedAllocator::FreeImpl(Allocation *allocation) {
 }
 
 uint64_t NPUPinnedAllocator::ReleaseImpl(const platform::Place &place) {
+  std::lock_guard<std::mutex> lock(mtx_);
+  // Empty implementation
   return static_cast<uint64_t>(0);
 }
 
 void NPUPinnedAllocator::RecordEvent(Allocation *allocation,
                                      aclrtStream stream) {
+  std::lock_guard<std::mutex> lock(mtx_);
   aclrtEvent event = nullptr;
   PADDLE_ENFORCE_NPU_SUCCESS(aclrtCreateEvent(&event));
   PADDLE_ENFORCE_NPU_SUCCESS(aclrtRecordEvent(event, stream));
diff --git a/paddle/fluid/memory/allocation/npu_pinned_allocator.h b/paddle/fluid/memory/allocation/npu_pinned_allocator.h
index 4c856b931ee2cf5b5734d90636b4bfd3dad138da..b330b6e352ce42140132d64994f2d76d3ff71e41 100644
--- a/paddle/fluid/memory/allocation/npu_pinned_allocator.h
+++ b/paddle/fluid/memory/allocation/npu_pinned_allocator.h
@@ -42,6 +42,7 @@ class NPUPinnedAllocator : public Allocator {
 
  private:
   std::unordered_map<Allocation *, aclrtEvent> npu_events_;
+  mutable std::mutex mtx_;
 };
 
 }  // namespace allocation