The embodiment of the invention provides a method for establishing an interface between base stations, a first base station and a second base station, which is used for solving a technical problem that excessive messages need to be transmitted by an interface when the interfaces is established between adjacent base stations so as to result in high information transmission pressure of the interfacein the prior art. The method for establishing an interface between base stations comprises the steps of obtaining an IP address of a second base station; transmitting a request message to the secondbase station based on the IP address of the second base station; and receiving a response message returned by the second base station based on the request message, wherein the response message includes cell configuration information of a part of cells in all cells under the second base station so as to establish an X2/Xn interface between the first base station and the second base station.