A device synchronization method in D2D communication implements synchronization between devices. One such method includes receiving first device-to-device (D2D) synchronization information sent by a first device in a D2D communication, including a secondary D2D synchronization signal (SD2DSS). The method further includes determining a synchronization source identifier and a forwarding hop count according to preset correspondences between the SD2DSS and the synchronization source identifier and between the SD2DSS and the forwarding hop count. A synchronization source which corresponds to the synchronization source identifier is synchronized with. The forwarding hop count in the first D2D synchronization information is updated in response to determining that the forwarding hop count in the first D2D synchronization information is less than a set threshold, to obtain second D2D synchronization information, and the second D2D synchronization information is sent.