diff --git a/services/sandbox_manager/main/cpp/src/mac/mac_adapter.cpp b/services/sandbox_manager/main/cpp/src/mac/mac_adapter.cpp
index c43361bd7703d091c3a6da14fe5416d4170204fd..92cb1fdd57eba15716e9210c592a0e13aa48b883 100644
--- a/services/sandbox_manager/main/cpp/src/mac/mac_adapter.cpp
+++ b/services/sandbox_manager/main/cpp/src/mac/mac_adapter.cpp
@@ -84,6 +84,9 @@ void MacAdapter::Init()
         SANDBOXMANAGER_LOG_INFO(LABEL, "Node exists, mac is support.");
         isMacSupport_ = true;
     }
+    if (fd_ > 0) {
+        return;
+    }
     fd_ = open(DEV_NODE, O_RDWR);
     if (fd_ < 0) {
         SANDBOXMANAGER_LOG_ERROR(LABEL, "Open node failed, errno=%{public}d.", errno);