A numerical simulation model for accurately solve transfer function of electrochemical seismometer is presented. The fluid-solid coupling physical field is firstly used to link the external vibrations with the motion morphology of internal electrolyte solution. Some simulation parameters are test by normative experimental method to make the simulation model and physical truth coincide. Relevancy of amplitude frequency response curve leading in simulation and measured results is 0. 97

based on the numerical model

the effect of the number of electrode pores on amplitude frequency response curve is discussed. By optimizing number of pores

at last

the working bandwidth is extended to 0. 14～ 100 Hz without exerting feedback.