The 223 earthquakes with M≥5． 0 in the Yunnan region during 1965 ～ 2014 wereanalyzed． Among them，74 earthquakes have foreshocks ( about 33． 2% ) ． There is greatdifference between different structures: the Lancang-Gengma and Tengchong-Baoshan block havethe most abundant foreshocks in the Yunnan region; the predominant magnitude difference，timeinterval and spatial distance are 0.5 ～ 2.9，within 10 days and within 20km respectively． We canuse those characteristics to forecast the mainshock after the identification of a foreshock．