The Xiaofeng-sanmenwan fault is a large-scaled NW trending fault in Zhejiang Province,The M5 1/4 Hangzhou earthquake of 929CE and the M4.5 Shengzhou-Xinchang earthquake of 1998 occurred at the intersection of the Xiaoshan-Qiuchuan fault and the Yuyao-Lishui fault. In this paper,the Guangde-Hangzhou segment of Xiaofeng-Sanmenwan fault in the is divided into the Guangde-Anji segment,the Anji-Huanghu segment and the Huanghu-Pingyao segment by the Suzhou-Anji fault and the Huzhou-Lin'an fault,characterized by normal fault. Based on field geological survey and the ESR dating result,it is concluded that the latest active time of the fault is in late Middle Pleistocene.