According to data of field geological investigation,geometry and kinematics characteristics of Tianqiaogou-Huangyangchuan active fault zone since later Pleistocene are described in detail.The fault zone may be divided into Tianqiaogou segment showing inverse left lateral strike slip nature and Huangyangchuan segment showing normal left lateral strike slip nature.Main active period of the fault zone is Pleistocene and its slip rate is 4~5 mm/a.In early Holocene,its active strength gradually became low,and the latest palaeoearthquake on the fault occurred 0.759×10⁴~1.02×10⁴ years ago.