Abstract：The seismic activities in China are chiefly concentrated in the West Region. The study of seismic mechanism and geostress measurement in West China becomes very important while the construction investment increases rapidly in recent years. The relation between seismic activity，geostress，and their present situation of study have been recounted. The geostress measurements in deep boreholes should be strengthened；and the technique and method of geostress measurement by hollow inclusion triaxial strain gauge have been emphatically described. Meanwhile，the geostress measured results at the Xiabandi Hydraulic Project in Xinjiang Autonomous Region have been presented.
