The embodiment of the invention relates to a service content synchronization method, a device and a system. The service content synchronization method comprises: in a multicasting/ broadcasting single frequency network, determining the transmission sequence of a service data packet of the service in service binding; according to the transmission sequence, determining a sequence identification for identifying the transmission sequence of each service data packet; and sending the service data packet carrying the sequence identification to a base station to ensure that the base station carries out synchronous dispatching on the service data packet according to the sequence identification carried in the service data packet after receiving the service data packet. The embodiment of the invention determines the transmission sequence of the service data packet of the service in the multicasting/ broadcasting single frequency network service binding and determines the sequence identification according to the transmission sequence, thus after receiving the service data packet, the base station can carry out synchronous dispatching on the service data packet according to the sequence identification so as to realize content synchronization among multiple loadings multiplexed by MBSFN service.