Seismicity feature of different scaled rectangles(Luhuo,Dawu,Kangding,Shimian)of Xianshuihe Fault and the principal compress axes of the recent stress filed are analyzed by investigating seismic activity data since 1970 and the data of focal mechanism of Sichuan region. Moreover,we preliminarily discuss the relationship between the earthquake frequency on Xianshuihe Fault and the seismic activity on Longmenshan Fault. We analyze seismogenic conditions of the Kangding M_S6.3 earthquake. The results show that:(1)seismic activity along Xianshuihe fault exhibits different features at northern and southern segments:the seismic activity frequency before 1981 is higher than the activity after 2000 on Luhuo and Dawu zone(northern segment). On the other hand,seismic activity frequency after 2000 beneath Kangding and Shimian zone(southern segment)is higher than the activity before 1981.(2)From the picture of P wave velocity structure,we can find that western side of the Kangding earthquake zone(Sichuan-Yunnan tectonic block)appears to have low velocity abnormal,which is different from the eastern part.(3)The principal compressional stresses of the Longmenshan fault and Xianshuihe Fault are mainly NW-SE and NWW-SEE under the recent structural stress field. Combined with the information of ground surface deformation,the deep structure,and the fault interaction,we infer that the seismogenesis of Kangding M_S6.3 is attributed to two factors-the accumulation of stress and induced earthquake of high-frequency seismic activity of Longmenshan Fault.