In this paper, the authors take survey about time synchronization mechanism in WSN. This information is collected by a cooperative survey about time synchronization protocol in WSN. In order to understand the synchronization mechanism in WSN. Generally, they are lot of mechanism presented their today's world to achieve synchronization. This helps the users to understand better knowledge about synchronization mechanism and effective protocol used in synchronization network and it aims to achieve accuracy and scalability of the network. Now-a-days, sensor nodes are deployed to monitor and control variety of application and it should be used for security purpose in real time application.