Master slave synchronization has been widely studying because of its fast convergence speed and high synchronization precision as a synchronization methods of Ad Hoc networks based on TDMA. In order to improve the convergence speed and synchronization precision of masterslave synchronization, solve some problems in existing masterslave synchronization protocol, this paper proposes a new synchronization method for ad hoc networks using the life cycle of network nodes. This paper discuss the implementation of the synchronization method in detail with the time frame design and the time slot access, then the convergence time and synchronization accuracy of the network nodes in different access scenarios are tested by OPNET simulation software. The simulation results show that when the number of access conflicting nodes reaches a maximum, the longest synchronization time in different network state does not exceed 1s, and the synchronization error between the source node and the 6 jumps node is only 0.37 ms.The fast convergence and accuracy of the synchronization method are verified.