The invention provides a hot backup method of an SCTP. A master device and a backup device are started at the same time as servers, a master server is produced through election according to a VRRP, and the IP of the server is configured. Through utilization of the functions of virtual servers, the master device forwards an SCTP message to the backup device, the forwarding functions in the virtual servers are modified, and the master device itself also obtains the message for processing. A firewall is set in the backup device, redundant SCTP feedback packets are filtered, the message is prevented from looping back between the master device and the backup device so that a client receives repeated acknowledgement of receipts, while a heartbeat request packet is allowed so that heartbeat detection of the backup device is ensured. When a fault appears in the master device, the backup device can timely discover the fault according to the VRRP, the IP of the server is obtained, the firewall is closed, the backup device is switched to the master server, and the client docks with the new master server seamlessly. The technical scheme provided by the invention is simple in implementation and is especially suitable for a base station core network scene. The cost is reduced. The method has outstanding market value.