diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 19e96e96629635d55e87c0a62498b434080db67d..485602157984749aa7d2d0a23d0b39bb8794d2fc 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -68,6 +68,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-428 - Add PushTaskByDataLocality in scheduler
 - MS-440 - Add DumpTaskTables in sdk
 - MS-442 - Merge Knowhere
+- MS-445 - Rename CopyCompleted to LoadCompleted
 
 ## New Feature
 - MS-343 - Implement ResourceMgr
diff --git a/cpp/src/scheduler/Scheduler.cpp b/cpp/src/scheduler/Scheduler.cpp
index 4c7f0ce6f7912bbbb727c12584561a8d3f86371e..03fa479df68a9a99e0002e67bd73dc976e2aa9e1 100644
--- a/cpp/src/scheduler/Scheduler.cpp
+++ b/cpp/src/scheduler/Scheduler.cpp
@@ -76,8 +76,8 @@ Scheduler::Process(const EventPtr &event) {
             OnStartUp(event);
             break;
         }
-        case EventType::COPY_COMPLETED: {
-            OnCopyCompleted(event);
+        case EventType::LOAD_COMPLETED: {
+            OnLoadCompleted(event);
             break;
         }
         case EventType::FINISH_TASK: {
@@ -108,8 +108,8 @@ Scheduler::OnFinishTask(const EventPtr &event) {
 }
 
 void
-Scheduler::OnCopyCompleted(const EventPtr &event) {
-    auto load_completed_event = std::static_pointer_cast<CopyCompletedEvent>(event);
+Scheduler::OnLoadCompleted(const EventPtr &event) {
+    auto load_completed_event = std::static_pointer_cast<LoadCompletedEvent>(event);
     if (auto resource = event->resource_.lock()) {
         resource->WakeupExecutor();
 
diff --git a/cpp/src/scheduler/Scheduler.h b/cpp/src/scheduler/Scheduler.h
index 012a479a824aafac9aad46c82a1e6190fd09da54..e2d51ee31dae02268f345bc9bf8cc4ea49604bca 100644
--- a/cpp/src/scheduler/Scheduler.h
+++ b/cpp/src/scheduler/Scheduler.h
@@ -82,7 +82,7 @@ private:
      * Pull task from neighbours;
      */
     void
-    OnCopyCompleted(const EventPtr &event);
+    OnLoadCompleted(const EventPtr &event);
 
     /*
      * Process task table updated events, which happened on task_table->put;
diff --git a/cpp/src/scheduler/event/Event.h b/cpp/src/scheduler/event/Event.h
index 788cfd6a73f2c958b500372952839a02ea12ca8c..777bede842d6a9cba225672db9a8e6749fca6cbd 100644
--- a/cpp/src/scheduler/event/Event.h
+++ b/cpp/src/scheduler/event/Event.h
@@ -13,7 +13,7 @@ namespace engine {
 
 enum class EventType {
     START_UP,
-    COPY_COMPLETED,
+    LOAD_COMPLETED,
     FINISH_TASK,
     TASK_TABLE_UPDATED
 };
diff --git a/cpp/src/scheduler/event/EventDump.cpp b/cpp/src/scheduler/event/EventDump.cpp
index 0d10f6f7b4fa4af451e4fffc613f1f1825ebf688..ceee63ba9d226a8e5faf3abe76052ad8f1311123 100644
--- a/cpp/src/scheduler/event/EventDump.cpp
+++ b/cpp/src/scheduler/event/EventDump.cpp
@@ -6,7 +6,7 @@
 
 #include "Event.h"
 #include "StartUpEvent.h"
-#include "CopyCompletedEvent.h"
+#include "LoadCompletedEvent.h"
 #include "FinishTaskEvent.h"
 #include "TaskTableUpdatedEvent.h"
 
@@ -25,7 +25,7 @@ std::ostream &operator<<(std::ostream &out, const StartUpEvent &event) {
     return out;
 }
 
-std::ostream &operator<<(std::ostream &out, const CopyCompletedEvent &event) {
+std::ostream &operator<<(std::ostream &out, const LoadCompletedEvent &event) {
     out << event.Dump();
     return out;
 }
diff --git a/cpp/src/scheduler/event/CopyCompletedEvent.h b/cpp/src/scheduler/event/LoadCompletedEvent.h
similarity index 69%
rename from cpp/src/scheduler/event/CopyCompletedEvent.h
rename to cpp/src/scheduler/event/LoadCompletedEvent.h
index d2f5ddb0ff22f11e391bcb3a95605c0ad42d2c51..c59b6256cb030dc7e30e74e492b7732c7ede1d79 100644
--- a/cpp/src/scheduler/event/CopyCompletedEvent.h
+++ b/cpp/src/scheduler/event/LoadCompletedEvent.h
@@ -13,18 +13,18 @@ namespace zilliz {
 namespace milvus {
 namespace engine {
 
-class CopyCompletedEvent : public Event {
+class LoadCompletedEvent : public Event {
 public:
-    CopyCompletedEvent(std::weak_ptr<Resource> resource, TaskTableItemPtr task_table_item)
-        : Event(EventType::COPY_COMPLETED, std::move(resource)),
+    LoadCompletedEvent(std::weak_ptr<Resource> resource, TaskTableItemPtr task_table_item)
+        : Event(EventType::LOAD_COMPLETED, std::move(resource)),
           task_table_item_(std::move(task_table_item)) {}
 
     inline std::string
     Dump() const override {
-        return "<CopyCompletedEvent>";
+        return "<LoadCompletedEvent>";
     }
 
-    friend std::ostream &operator<<(std::ostream &out, const CopyCompletedEvent &event);
+    friend std::ostream &operator<<(std::ostream &out, const LoadCompletedEvent &event);
 
 public:
     TaskTableItemPtr task_table_item_;
diff --git a/cpp/src/scheduler/resource/Resource.cpp b/cpp/src/scheduler/resource/Resource.cpp
index 6789d00c8927ca59120c03e4730636ec32050a1b..75c3b4d78456bf6a42eba2b0acd5d67e5126f21c 100644
--- a/cpp/src/scheduler/resource/Resource.cpp
+++ b/cpp/src/scheduler/resource/Resource.cpp
@@ -113,10 +113,9 @@ void Resource::loader_function() {
                 break;
             }
             LoadFile(task_item->task);
-            // TODO: wrapper loaded
             task_item->Loaded();
             if (subscriber_) {
-                auto event = std::make_shared<CopyCompletedEvent>(shared_from_this(), task_item);
+                auto event = std::make_shared<LoadCompletedEvent>(shared_from_this(), task_item);
                 subscriber_(std::static_pointer_cast<Event>(event));
             }
         }
diff --git a/cpp/src/scheduler/resource/Resource.h b/cpp/src/scheduler/resource/Resource.h
index 76c0b007bf2f2631ec68165757f4b5fdeff02ddb..dcd5fb5d8f9db407194f88412fe2603570782010 100644
--- a/cpp/src/scheduler/resource/Resource.h
+++ b/cpp/src/scheduler/resource/Resource.h
@@ -14,7 +14,7 @@
 
 #include "../event/Event.h"
 #include "../event/StartUpEvent.h"
-#include "../event/CopyCompletedEvent.h"
+#include "../event/LoadCompletedEvent.h"
 #include "../event/FinishTaskEvent.h"
 #include "../event/TaskTableUpdatedEvent.h"
 #include "../TaskTable.h"