The invention discloses a multi-path establishment method and device, and belongs to the technical field of communication. The method is applied to proxy equipment and comprises: carrying out identityverification on a terminal accessing a first network through first network access equipment, wherein the first network realizes communication through a base station; performing admission check on theterminal accessing the second network through the second network access device; and establishing a first path between the terminal and the service server on the first network and establishing a second path between the terminal and the service server on the second network after the identity verification and admission check of the terminal are passed, the first path and the second path being used for performing data transmission between the terminal and the service server. According to the invention, the first path and the second path between the terminal and the service server are establishedonly after the identity verification and admission check of the terminal are passed, so that the safety of the established first path and second path is relatively high, and the data transmission safety of the subsequent terminal can be ensured.