This paper points out the necessity and importance to realize the mechanization of highway snow shovel, analyses the working principle of the spiral snowplough, calculates the working power of the spiral snowplough and gives the application range of the snowplough. 指出实现道路除雪机械化的必要性和重要性,分析计算旋切抛雪装置的工作原理及其工作功率,提出其应用范围。