Abstract: By designing standard spiral specimens, the filling length of the molten steel in spiral mold was simulated by using discrete element software. The effect of multi-dimensional high-frequency vibration on the flow properties of the molten steel was explored. Through orthogonal experiment, the influence degree of different vibration factors on liquid steel filling fluidity was analyzed by means of range and variance analysis. The results show that vibration during pouring can effectively improve the filling flow performance of molten steel. When the vibration direction is three degrees of freedom, the vibration frequency is 45Hz, and the amplitude is 0.45mm, the filling flow effect is the best. The casting model of gear-rail casting was made, and the experimental results are basically consistent with the simulation results of discrete element software. In the production process of gear rail castings, the application of high frequency multi-dimensional vibration to the mold is helpful to reduce the casting defects and improve the mechanical properties.