Method and device for switching CSG (Closed Subscribe Group) cell based on X2 interface

The invention discloses a method and device for switching a CSG cell based on an X2 interface. The method comprises the steps: before initiating a switching request to a target node base station, a source node base station sends request information to core network equipment so as to request for judging whether user equipment is allowed to be accessed to a corresponding target node base station cell, receives response information returned by the core network equipment, initiates the switching request to the corresponding target node base station for switching based on the X2 interface when the judgement result is that the user equipment is allowed to be accessed to the corresponding target node base station cell, wherein the response information carries judgement result information. Another method comprises the steps of: after the user equipment is accessed, obtaining subscription information of the user equipment at an adjacent CSG cell from the core network equipment, judging whether the target node base station cell allows the user equipment to be accessed according to the subscription information of the user equipment at the adjacent CSG cell when the node base station needs to switch the user equipment to the target node base station, and switching based on the X2 interface in the event of judging that target node base station cell allows the user equipment to be accessed. According to the invention, network overhead can be reduced.