A synchronization processing method, comprising steps of: determining, by a User Equipment, UE, outside a coverage area, a synchronization resource starting position of a UE within the coverage area after the UE outside the coverage area has detected a synchronization signal from the UE within the coverage area; determining, by the UE outside the coverage area, its own synchronization resource starting position in accordance with the synchronization resource starting position of the UE within the coverage area; and transmitting, by the UE outside the coverage area, a synchronization signal in accordance with its own synchronization resource starting position and its own synchronization resource period, characterized in that subsequent to detecting, by the UE outside the coverage area, the synchronization signal from the UE within the coverage area, the synchronization processing method further comprises: determining, by the UE outside the coverage area, a synchronization resource period of the UE within the coverage area; and detecting, by the UE outside the coverage area, continuously the synchronization signal from the UE within the coverage area in accordance with the synchronization resource starting position and the synchronization resource period of the UE within the coverage area, wherein the step of determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area comprises: determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization signal; or detecting, by the UE outside the coverage area, a synchronization channel from the UE within the coverage area, and determining the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization channel. determining, by a User Equipment, UE, outside a coverage area, a synchronization resource starting position of a UE within the coverage area after the UE outside the coverage area has detected a synchronization signal from the UE within the coverage area; determining, by the UE outside the coverage area, its own synchronization resource starting position in accordance with the synchronization resource starting position of the UE within the coverage area; and transmitting, by the UE outside the coverage area, a synchronization signal in accordance with its own synchronization resource starting position and its own synchronization resource period, characterized in that subsequent to detecting, by the UE outside the coverage area, the synchronization signal from the UE within the coverage area, the synchronization processing method further comprises: determining, by the UE outside the coverage area, a synchronization resource period of the UE within the coverage area; and detecting, by the UE outside the coverage area, continuously the synchronization signal from the UE within the coverage area in accordance with the synchronization resource starting position and the synchronization resource period of the UE within the coverage area, wherein the step of determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area comprises: determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization signal; or detecting, by the UE outside the coverage area, a synchronization channel from the UE within the coverage area, and determining the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization channel. determining, by the UE outside the coverage area, a synchronization resource period of the UE within the coverage area; and detecting, by the UE outside the coverage area, continuously the synchronization signal from the UE within the coverage area in accordance with the synchronization resource starting position and the synchronization resource period of the UE within the coverage area, wherein the step of determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area comprises: determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization signal; or detecting, by the UE outside the coverage area, a synchronization channel from the UE within the coverage area, and determining the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization channel. determining, by the UE outside the coverage area, the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization signal; or detecting, by the UE outside the coverage area, a synchronization channel from the UE within the coverage area, and determining the synchronization resource period of the UE within the coverage area in accordance with synchronization resource period information carried in the detected synchronization channel.