The communication network and signal synchronization technology play a vital role in the development of intelligent distribution network. At present, the distribution network is large in scale, complex in structure and large in number of terminals. The existing technical means can no longer meet the demand of full coverage of communication and accurate synchronization of signals in distribution network. Aiming at the weak communication environment of distribution network, this paper proposes a wide area communication and synchronization scheme for distribution network based on the wireless industrial automation (WIA). The architecture of communication network and synchronization system is introduced in detail in this paper. The experimental results show that the combination of WIA technology and existing power communication resources can effectively solve the problems of acquisition blind spot and insufficient network coverage, and it can provide precise synchronization means for distribution network measurement system.