Abstract: The successful hosting of Beijing 2022 Winter Olympic Games requires correct judgment on key issues such as snowmaking. Based on the site characteristics, the field investigation of reference snowfield, the discussion with domestic and abroad experts and systematic analysis of relevant influencing factors, the study analyzes the technical standards, protection schemes,design of snow-making water system and snow-making at different altitudes and special temperatures in Beijing 2022 Winter Olympic Games. The results show that type of skiing ground of Beijing 2022 Winter Olympic Games is complex, which has advantages and challenges. Snow making will be affected by many factors. In the design of snow making, the accumulated snow making thickness of 1 m can be determined as the basic snow making amount of ski track, and then the snow making amount and water consumption can be calculated according to the snow making index. In the process of snow making and snow protection,extreme weather conditions should be taken into account, and different support technical schemes should be flexibly applied to make the snow track meet the requirements of the event. The design of snow making water system needs to achieve the regional water balance in the competition area. Adopt multi-mode network snow making system, and pay attention to the gradient decline of snow making in high mountains. High altitude snow making and hoarding are also the key guarantee of the event.