In order to solve the time synchronization problem of wireless distributed data in the field test of intelligent substation, this paper proposes a multi terminal synchronization control strategy for wireless data communication. It introduces the substation area test for the intelligent substation and its key problems, describes the influence of the uncertain network transmission delay time on the IEEE 1588 network clock synchronization protocol, researches the sample filtering, synchronous correction, time domain following and other issues that based on the single point to multipoint wireless communication system synchronization, and gives the implementation scheme. Experiments show that the synchronization precision with this synchronous control in the wireless communication can reach microsecond, which can meet the synchronization demand of the intelligent substation system-level test.