The present disclosure provides a backhaul link establishment method, a base station, and a device. The method includes: sending, by a base station, an offloading bearer request message to a first LPN according to a backhaul offloading establishment request message; receiving, by the base station, an offloading bearer acknowledgement message sent by the first LPN; sending, by the base station, an offloading bearer configuration message to a first UE-relay; and sending, by the base station, a received ID of a service bearer and received second S1 configuration information of the service bearer to a core network element by using an MME. In this way, backhaul load on uplink/downlink resources of the base station is reduced.