Abstract: The dynamic equations of a self-synchronous vibration system driven by two exciters rotating oppositely are deduced taking account of the mechanical characteristics of the two driving motors. By numerical simulation, the effects of the exciters' eccentric torque, motor power and resisting moment due to rotating friction on self-synchronization motion are discussed. The results show that the vibration system can achieve stably synchronous motion if all the exciter parameters are within certain threshold values. The amplitude of vibrating body in y direction is in direct proportion to eccentric torque, thus realizing that the time for stable synchronization is in inverse proportion to eccentric torque. The effect of the rated torque of motor on synchronization is not obvious, while the rotary damping parameter mainly affects the time required to transfer to synchronization.