Abstract: The output zero drift of shock sensor is an important characteristic affecting.The problem of zero drift has been explored for a long time.Starting from the characteristics of the output signal of the shock sensor，the sensor model and the transformation circuit is analyzed.Combined with the relationship between the frequency response of the sensor installation and shock signal，it is concluded that the high-frequency shock signal is amplified at the resonant frequency of the sensor installation and the amplification leads to zero drift.The correctness of the theoretical derivation is verified by comparing the theoretical derivation with the actual sensor output results.Finally，the zero drift suppression measures and practical results are described.

Key words: Shock sensor, Output zero drift, Zero drift suppression