通过对近年来我国小麦白粉病发生流行情况的分析，总结讨论了影响小麦白粉病流行的气温和降水量等气候因素，结果表明秋冬季及早春气温偏高、小麦生长后期气温偏低，对病害的流行有利；多雨尤其是黄淮海及其以北地区多雨，对病害的流行有利。反之则不利于病害的发生，流行程度将会减轻。 By analyzing the prevalence of wheat powdery mildew in recent years in our country, the climatic factors such as air temperature and precipitation that affect the prevalence of powdery mildew in wheat are summarized. The results show that the air temperature is high in autumn, early winter and early spring, The prevalence is favorable; rainy, especially the Huang-Huai-Hai and its northern areas, are wet and are good for the epidemic of diseases. On the contrary is not conducive to the occurrence of disease, the degree of prevalence will be reduced.