灾害性天气是对人民生命财产有严重威胁,对工农业和交通运输会造成重大损失的天气。如大风、暴雨、冰雹、龙卷风、寒潮、霜冻和大雾等。可发生在不同季节,一般具有突发性。就大风、暴雨、暴雪等天气给北京市密云县设施农业造成的危害进行阐述,继而总结出在灾害性天气来临时,做好充分有效的应对和防备灾害性天气突袭的防御对策。 Severe weather is a serious threat to people’s lives and property, and will cause heavy losses to industry, agriculture and transportation. Such as gale, rainstorm, hail, tornado, cold wave, frost and fog. May occur in different seasons, generally with a sudden. This paper elaborates the hazards caused by the gale, torrential rain and Blizzard to the facilities agriculture in Miyun County, Beijing. Then it summarizes the defensive countermeasures of responding adequately and effectively in the event of disastrous weather raids when the disastrous weather is approaching.