The invention provides an LTE (Long Term Evolution) broadband cluster system transmission switching method, equipment and a system. According to the invention, when standby core network equipment acquires a heartbeat anomaly message of primary core network equipment, the standby core network equipment establishes connection with a scheduling server; the standby core network equipment allocates a first Internet protocol (IP) address for a wireless router and configures functions of the wireless router; the wireless router sends a first tunnel building message to a GRE server according to the first IP address; the GRE server builds a GRE tunnel with the wireless router according to the first IP address in the first tunnel building message, and transmits messages to attached equipment of the wireless router through the GRE tunnel. Through setting the GRE server, the GRE tunnel is built between the wireless router and the GRE server after core network switching, messages are transmitted to the attached equipment of the wireless router through the GRE tunnel, routing information of the attached equipment is not required to be artificially configured, and message transmission after core network switching is realized efficiently.