This paper sums up the activities of historical and modern earthquakes in YunnanProvince and suggest that the seismicities in the region are characterized by high frequency,large magnitude,shallow source and strong disruption.The strong earthquakes can be divided into mainshock and mainshock-aftershock sequences. Since the present century,the activities of strong earthquakes tend to migrate in counterclockwise direction. In addition,authors analyze and discuss preliminarily the causes of the seismicities,and put forward some earthquakes prediction countermeasures for Yunnan region based on these seismicity characters.