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According to inertial properties and surface characteristic of rice seed, Euler dynamical model was built. Matlab software was used to simulate the movement stability of the seeds. The numerical simulation results proved that rotation about x-axis and y-axis was unconditional stability, while rotation about z-axis was stable with some conditions. The effect of parameters on movement stability of rotation about z-axis, such as crank length, angular velocity, the friction coefficient between the rice seed and the guide plate, angle of vibrating board, and angle of guide plate, were analyzed. According to the results of simulation, through orthogonal experiment on fabricated device, a set of optimized parameters were obtained. Through experiments, above 89% embryo of rice seed were ordered.