根据北祁连山东段活动断裂带1∶5万地质填图资料,系统分析了断裂带的几何学特征、位移分布、滑动速率、古地震及历史地震活动在时空上的非均匀性特征,研究了断裂带的破裂分段性.认为,北祁连山东段活动断裂带可以划分为老虎山断裂段和毛毛山-金强河断裂段两个一级破裂段,并且还可以分别进一步划分为老虎山东、西断裂段和毛毛山断裂段、金强河断裂段等二级破裂段. According to the 1: 50000 geological mapping data of the active fault zone in the eastern part of the North Qilian Mountains, the geometric characteristics, displacement distribution, slip rate, paleoearthquakes and the non-uniformity of the historical seismic activity in time and space of the fault zone are systematically analyzed. It is considered that the active fault zone in the eastern part of the northern Qilian Mountains can be divided into two first-level rupture sections of the Laoshan fault zone and the Mao-shan-Jinqianghe fault zone, and further divided into two parts: West fault section and Maomaoshan fault section, Jinqianghe fault section and other secondary rupture section.