In this study, the analysis of the flow field of the pump design, the vibration parameter and the strength of the pump is investigated. By the general devising way, one could get the geometric parameter of the pump and write the corresponding grid programs, the CFD software is used to study the influence of parameters on the flow field of the pump and its functions and the optimization design is obtained. Furthermore,the influence of the impeller parameter to the frequencies and the mode shaps is studied.