Abstract:The Yushu Ms 7.1 earthquake was happened at 7:49:40.7 on April 14, 2010 in Yushu county of Qinghai province. Field investigation and analysis indicate that the Yushu segment of GanziYushu fault is the earthquake causing fault. The total rupture length caused by the Yushu earthquake is 23 km with a strike direction of NWWNW. The rupture is mainly characterized by leftlateral slipping, which can be further divided into three segments. The west segment is a continuous leftlateral slipping rupture, near the site, named Guoyangyansongduo, of Longbao town (33°03′11″N, 96°51′26″E), the horizontal offsets of the rupture is 1.75m, which is the largest amount measured, so the authors regard this area is the macroscopical epicenter. The middle segment is mainly located at the south of the city town, and composed by several rightstep subruptures. The east segment is mainly characterized by thrusting associated with leftlateral strikeslipping. Besides a large amount of house ruining, the Yushu earthquake has caused a series of secondary geohazards, such as sand soil liquefaction and related road deformation, earthquakeinduced landslides, aqueduct damaged by the earthquake and related soil landslide and mudflow, etc. After comprehensive analysis of the endogenic and exogenic geohazards, proposals have been given forth for fault avoidance and reconstruction site selection in the Yushu earthquake stroked area.