A channel allocation method based on Shapley value in wireless networks is provided. The method comprises: disclosing by a PU (primary user) some idle channels denoted by serial numbers, a utilization rate threshold, a lowest selling price, and an increment between two bidding prices; SUs (secondary users) reporting the corresponding numbers of required channels to the PU; calculating a plurality of legal teams satisfying the utilization rate threshold; classifying the plurality of SUs; calculating the Shapley value of each SU in each legal team; calculating an estimated price of each multi-user in each legal team; determining the retained legal teams; performing an ascending auction process by the retained legal teams; and allocating the channels to the SUs in the winning team.