In the next generation network, there are more and more types of service. And the resource allocation control is more and more difficult. So it is very useful to do some research in this field. An algorithm which is flexible and adaptive can make the parlay gateway works better. In this paper a proved adaptive and sensitive resource allocation algorithm has been presented in the environment of Parlay multi-service. The simulation results indicate that this algorithm can satisfy the requirements of different kinds of service. The Parlay gateway can make full use of resource using this algorithm.