A networking method for mobile terminals is provided, including: dividing a frequency spectrum resource suitable for operation in a mobile communication network into three kinds of frequency bands which are a CB, a LB, and a UB; and establishing, by a calling mobile terminal, a radio communication connection with a called mobile terminal on the CB or the LB or the UB; wherein the calling mobile terminal and the called mobile terminal are implemented by an SDR way. The present disclosure also discloses a mobile terminal. Accordingly, not only a utilization rate of a frequency spectrum resource and a resource usage rate of a base station are improved, a coverage range of the mobile communication network is expanded, but also mobile terminal user experience is improved.