The invention relates to a game type selection-based method for realizing dynamic spectrum allocation. With the development of the wireless communication technology, the traditional fixed spectrum allocation mode which leads to the waste of resources and has low spectrum utilization rate, has become the key factor of limiting the further development of the wireless communication network. The cognitive radio-based dynamic spectrum allocation technology is considered as a key technology for effectively solving the problem. In the method of the invention, by comparing the perfect dynamic game with the return of Nash Bargaining, the cognitive base station and the secondary user can separately choose an optimal strategy flexibly and fairly, namely an optimal spectrum quoted unit price and a spectrum purchase quantity. Meanwhile, in order to realize the selection operations of the both sides, a simple spectrum access procedure is designed to be compatible with the traditional mobile call access procedure. By adopting the invention, the returns of the cognitive base station and the secondary user can be effectively increased and the spectrum utilization can be promoted.