A dynamic model for space double-mass long-distance level nonlinear vibrator conveyer is set up. Analysis of dynamics and self-synchronism theory of the system are carried out, and the relation between the index number of synchronism and stability are obtained. The research is applied to conveying of granular material. According to the experiment, when the extent of the distinction between the conveyer and the motor is less than 1.2%, it is easy to realize the function of the systems self-synchronism. And it is very important for the synchronism of the system and stability to control the vibrating direction and position error when fixing two motors.