The invention relates to a wireless access control method and device for a software defined network (SDN) and belongs to the field of mobile communication technology. According to the method, a controller has wireless access to a control module to obtain the status of a mobile terminal (MT), QoS requirements of the MT, the status of APs and network resource status information according to an access request message of the MT; candidate APs are determined according to factors such as the QoS requirements of the MT and the moving direction, and if multiple candidate APs exist, the AP with the highest signal intensity is selected as a target AP; the target AP accepts / rejects an MT access request. According to the wireless access control method and device for the SDN, the QoS requirements of the MT, status information of the MT and the APs, an SDN architecture and other characteristics are considered comprehensively, MT access control under the wireless SDN architecture is achieved; according to the scheme, the QoS satisfaction degree of the MT is effectively improved, MT access delay is shortened, MT access AP signal stabilization is guaranteed, and network stability is improved.