利用云南省123个气象台站1960年以来的降雨量资料,使用年降雨量距平百分率方法，分析楚雄强震与降雨量的关系,结果发现:年降雨量距平百分率≥0.25的台站数大于8，次年云南地区皆有Ms≥6.0地震，也是楚雄地区发生6级强震背景条件；楚雄地区强震前表现涝异常，即该区域强震具有涝—震特征。

Using precipitation data from 123 stations in Yunnan province since 1960 and the method of annual precipitation anomaly percentage, we obtain the results: ① if there were more than 8 stations with annual precipitation anomaly percentage＞0.25, earthquakes with M≥6.0 would happen in Yunnan region, which is also the background condition that earthquakes with M≥6.0 would happen in Chuxiong area；② strong earthquakes in Chuxiong area basically happened in the places where stations with annual precipitation anomaly percentage＞0.25 comparatively centralized；③ there were waterlogging abnormity before strong earthquakes in Chuxiong area, that is waterlogging—earthquake character.