The present invention relates to the field of communications technologies, and in particular, to an RLC data packet offloading method and a base station, so as to solve a problem that performance of UE in a CA scenario of a non-ideal backhaul HetNet is affected due to a relatively long transmission delay between a macro eNodeB and a micro eNodeB. In embodiments of the present invention, a micro eNodeB may request a required RLC data packet before scheduling is performed; therefore, a macro eNodeB can send, to the micro eNodeB in advance, the RLC data packet required by the micro eNodeB, which reduces a transmission delay between the macro eNodeB and the micro eNodeB as much as possible, and improves receiving performance of UE.