Abstract: In order to improve the stability of the horizontal vibrating centrifuge,established the mathematical model of the horizontal vibrating centrifuge,and then Simplified the model based on centrifuge existence and conducted numerical analysis.Study results show that reducing the ratio of system damping can lower the amplitude of primary vibration mass,increasing the stiffness of rubber spring can expand the near-resonant interval,which two methods can both improve the stability of the horizontal vibrating centrifuge.