In Pound-Drever-Hall laser frequency stabilization method,the linear dynamic range and sensitivity of error signal are important factors which affecting stabilization quality.To optimize the performance of Pound-Drever-Hall method,this paper analyzes the influence of modulation frequency,FP cavity mirrors′ reflection ratio and cavity length on dynamic range and sensitivity theoretically,and discuss in quantity by means of simulation.The results indicate that dynamic range and sensitivity have close relationship with modulation frequency,reflection ratio and cavity length;stabilization effect can be enhanced through proper selection of these parameters,as well as taking accuracy and flexibility requirements into account,and finally,optimizing modulation depth can improve sensitivity of error signal.