Methods for emitting and receiving synchronisation signal, and terminal

Methods for emitting and receiving a synchronisation signal, and a terminal. The emitting method comprises: a first terminal determines downlink timing; the first terminal emits a synchronisation signal according to the determined downlink timing. Via the technical solutions of the methods for emitting and receiving a synchronisation signal, and the terminal provided by the present invention, an emitting terminal of user direct communication uniformly utilises downlink timing to emit a synchronisation signal, enabling a receiving terminal to accurately determine timing information of the emitting terminal according to the received synchronisation signal, and thereby correctly receive user direct communication information sent by the emitting terminal.