The invention provides a transmission method, an access network device and a terminal device, and the transmission method comprises the steps that the access network device receives an access requestmessage sent by a first terminal device, and the access request message is used for requesting to access the access network device; And the access network device sends an access request response message to the first terminal device, wherein the access request response message comprises configuration information of a first bearer, the configuration information of the first bearer is used for the first terminal device and the access network device to establish the first bearer, and the first bearer is a shared bearer of a plurality of terminal devices including the first terminal device. According to the transmission method provided by the embodiment of the invention, through the establishment of the shared bearer and the shared transmission path, the establishment of an independent end-to-end bearer when each terminal device accesses the network is avoided, and the signaling overhead can be saved.