In next generation heterogeneous wireless networks,vertical handoff plays an important role in guaran-teeing system performance,and the network selection before vertical handoff execution is a key problem.As theexisting algorithms cannot make users and networks satisfied simultaneously and possess high call blocking rate andcall drop rate,a non- cooperative game theory- based selection algorithm of heterogeneous networks is proposed,which obtains the best network selection scheme by taking into account user preferences,business prices and accesscosts.This algorithm implements network selection from a new perspective,and allocates users' requests throughthe game among member networks.Simulated results show that the proposed algorithm helps not only obtain lowerblo- cking rate and call drop rate but also achieve load balancing,so that it can fully utilize network resources toserve more users.