Abstract: A method of selecting the parameters enabling the anti-resonant vibrator's amplitude to be stabilized was proposed to solve the problem that the amplitude of the mass on the anti-resonant vibrator is highly sensitive to both resonance frequency and fluctuation of the material quantity charged on the vibrator. The basic concept of the method is to locate the anti-resonant point just at the midpoint between two resonant points and, what's more, the distance between the two points should be long enough. Then, the amplitude-frequency response curve will be comparatively flat, thus enabling the amplitudes of both upper and lower mass to be basically stable so as to meet the requirements in practice. And only a readjustment in small range is needed if high accuracy of amplitude is required to implement. Computer simulation verifies the correctness and applicability of the method proposed.