Abstract: The 2022 Beijing Winter Olympics is a significant landmark event held at an important historical juncture in China, providing an important opportunity to showcase the country's image and uplift the national spirit. Outdoor large and medium-sized snow trucks are the main operational equipment for ice and snow events. Their comprehensive performance and manufacturing technology are not only necessary foundations for ensuring the smooth progress of the event, but also a direct reflection of China's comprehensive national strength, such as manufacturing capacity, technological strength, and international competitiveness. To meet the development needs of outdoor large and medium-sized snow groomer, the research status and on-site problems of snow groomer at home and abroad have been reviewed. From the five levels of "demand analysis-key technology research-equipment development-application demonstration-system construction", research has been carried out in four aspects: promotion system, operation system, whole machine optimization and manufacturing, and testing evaluation. Seven key technologies have been investigated, including high-efficiency static hydraulic drive control of snow road surfaces, lightweight track reliability design, rubber suspension design in low-temperature environments, reliability design of snow roller in snow roller vehicles, precise control of snow roller operations in variable environments, lightweight design of snow roller frame and component structures, and construction of experimental verification technology and indicator system for outdoor large and medium-sized snow groomer. We have developed efficient, precise, environmentally friendly, and reliable SG400 outdoor large and medium-sized snow groomer. Based on the requirements of international ice and snow events for the track, performance verification and application demonstrations were carried out at different ski resorts such as the 2022 Beijing Winter Olympics, Winter Paralympic Games and the 14th National Winter Games in 2024. Finally, the future development trend of snow groomer is discussed to promote the intelligent, green, environmentally friendly, and efficient development of large and medium-sized snow groomer in China.