diff --git a/base/src/event_reactor.h b/base/include/event_reactor.h
similarity index 94%
rename from base/src/event_reactor.h
rename to base/include/event_reactor.h
index 83139bdc6277a4153a068696ddcba0d504cc7d26..3b4cf57f5964cae6e8382bf93e5306ff97270fb6 100644
--- a/base/src/event_reactor.h
+++ b/base/include/event_reactor.h
@@ -31,6 +31,9 @@ class TimerEventHandler;
 
 class EventReactor {
 public:
+    virtual ~EventReactor();
+
+private:
     using TimerCallback = std::function<void(int timerFd)>;
     static const uint32_t NONE_EVENT  = 0x0000;
     static const uint32_t READ_EVENT  = 0x0001;
@@ -43,7 +46,6 @@ public:
     EventReactor& operator=(const EventReactor&) = delete;
     EventReactor(const EventReactor&&) = delete;
     EventReactor& operator=(const EventReactor&&) = delete;
-    virtual ~EventReactor();
 
     uint32_t SetUp();
     void CleanUp();
@@ -67,12 +69,15 @@ public:
     uint32_t ScheduleTimer(const TimerCallback& cb, uint32_t interval /* ms */, int& timerFd, bool once);
     void CancelTimer(int timerFd);
 
-private:
     mutable volatile bool loopReady_; // refers to whether reactor is ready to call RunLoop().
     volatile bool switch_; // a switch to enable while-loop in RunLoop(). true: start, false: stop.
     std::unique_ptr<EventDemultiplexer> demultiplexer_;
     std::recursive_mutex mutex_;
     std::list<std::shared_ptr<TimerEventHandler>> timerEventHandlers_;
+    friend class Timer;
+    friend class EventDemultiplexer;
+    friend class EventHandler;
+    friend class TimerEventHandler;
 };
 
 } // namespace Utils
diff --git a/base/include/timer.h b/base/include/timer.h
index acc760b4bbbbce46b1b95d5546c75d28c9df0853..12a6f5c95dae79b3ede06697e7155ac26d98bef9 100644
--- a/base/include/timer.h
+++ b/base/include/timer.h
@@ -16,6 +16,8 @@
 #ifndef UTILS_TIMER_H
 #define UTILS_TIMER_H
 
+#include "event_reactor.h"
+
 #include <sys/types.h>
 #include <cstdint>
 #include <string>
@@ -25,8 +27,6 @@
 #include <thread>
 #include <vector>
 
-#include "../src/event_reactor.h"
-
 namespace OHOS {
 namespace Utils {
 /**
diff --git a/bundle.json b/bundle.json
index 4366b17f3a2b7b01632d8a22924cd58e4428e730..4bdf345ed986162a4ee1c6b52e36ba3d9a05a1da 100644
--- a/bundle.json
+++ b/bundle.json
@@ -63,7 +63,8 @@
               "thread_ex.h",
               "thread_pool.h",
               "timer.h",
-              "unique_fd.h"
+              "unique_fd.h",
+              "event_reactor.h"
             ],
             "header_base": "//commonlibrary/c_utils/base/include"
           }
@@ -96,7 +97,8 @@
               "thread_ex.h",
               "thread_pool.h",
               "timer.h",
-              "unique_fd.h"
+              "unique_fd.h",
+              "event_reactor.h"
             ],
             "header_base": "//commonlibrary/c_utils/base/include"
           }