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In order to calibrate the frequency response of high-g accelerometer, a system for calibrating the frequency response of high-g accelerometer with narrow pulse width is designed in this paper. The system uses the Hopkinson bar as the test device, the laser Doppler velocimeter as the reference signal measuring device, based on the measurement principle of narrow pulse frequency response. The Hanning window and cubic interpolation method with higher accuracy are selected to process the signal, and the program is written on the LabVIEW and MATLAB development environment to realize the calculation of the frequency response of the calibrated MEMS high g accelerometer. The test results show that the system can calculate the amplitude-frequency characteristics of high-g accelerometers, the estimated error of the working frequency band of the sensor is less than 10%, and the obtained sensor frequency response characteristics are consistent. So as to improve the efficiency of frequency response calculation, the system abandons the previous specialized signal processing method, adopts a signal processing method that is generally applicable to input signals, improved the frequency response test efficiency by about 20%, and this system is practical in the fast calibration test of accelerometer frequency response.