This paper introduces three kinds of scheduling algorithms commonly used in wireless correspondence.In order to improve the spectrum utilization rate

it proposes a QoS-based Proportional Fair（PF） scheduling algorithm on the basis of comparing the influences of these three algorithms on the system performances.This algorithm incorporates the advantages of the other scheduling algorithms.In the experiment

it allocates the users with different QoS parameters and the users with different allocations have different throughputs.Furthermore

the system gives priority to the needs of the optimal users.This algorithm improves the maximum throughput of the system

ensures the fairness of user scheduling

provides the users with different services and satisfies the different needs of the users.