By utilizing the risk degree as abnormal climate effect on agricultural production and discussing the general regular of the major disasters′s risk degree in Guizhou province,it is pointed out that the drought′s risk degree is larger and the flooding damage,wind-hail and frost′s risk degrees are smaller for any production object The larger risk degrees of drought,the flooding damage,wind-hail and frost appear are mainly in heavy summer drought area,heavy autumn continuous rain area,heavy hail area and heavy frost area.