Abstract: In order to investigate the snow removal effect of the snow removal plow, the structure of the snow removal plow was optimized based on the smooth particle hydrodynamic method. The snowdrift model was established by SPH method, and the snow plow of the Motor Train Units obstacle removal was modeled by parametric method. The influence of snow removal speed on snow removal effect was studied, and relationship between the snow plow opening angle, snow plow front angle with the snow removal resistance was analyzed under the worst snow removal conditions. Studies show that a snow removal speed of 60 m/s has the greatest impact. As the opening angle increases, the average resistance of longitudinal and vertical snow removal increases. As the front angle increases, the longitudinal snow removal resistance decreases and the average vertical snow removal resistance increases. Finally, orthogonal experiments were carried out through different structural parameters of snow plow, and a group of optimal combination of structural parameters of snow plough was selected. This study can provide a reference for snow removal problems of Motor Train Units in alpine regions to cope with the windblown snow conditions.