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At present, there are still many aero-engine test cell using analog vibration measuring instruments. Filtering and integral selection need to be tailored for the aero-engine type. The flexibility is not enough, and the vibration frequency can not be analyzed, which can not meet the requirements of engine vibration analysis. Choosing the appropriate vibration sensor, vibration measuring instrument and adopting the appropriate software analysis method, measuring the engine vibration value quickly and accurately and analyzing the vibration frequency are the requirements of engine factory and engine test. In this paper, the piezoelectric accelerometer is selected for the vibration measurement of the engine and the differential amplifier with anti-aliasing filter is used to eliminate frequency aliasing and common mode interference. Special vibration analysis software has been compiled, Butterworth filter and Flat Top window function are used in the vibration analysis software. This method can satisfy the filtering requirements of pass-band smoothness < 5%, stopband attenuation greater than - 30dB / octave and vibration measurement accuracy < 5%. The vibration measurement method proposed in this paper is accurate and reliable, and can meet the requirements of engine factory and test cell vibration measurement.