In this article, explaining all aspects of the heavy snow weather to affect flight. Begin from analyzing the characteristics and distribution of the heavy snow weather, combining aviation meteorology, aerodynamics, flight performance, aircraft structure analysis of knowledge related to the harm of heavy snow weather. Emphatically discussing the psychology of pilot which they are facing this weather condition. Analyzing each part of aircraft accumulates ice. And explaining the reason of why contaminated runway must be closed during heavy snow weather. Finally, this article discusses how to overcome the heavy snow weather during each stage of flight. And it simply describes the Doppler Weather Radar uses for heavy snow weather. Looking forward this article not only can play a reference about flying, but also can help pilots solve flying problems in the future.