In this paper, the fault geometric characteristics on various scales are preliminarily studied for the segments of Aerjin south and north fringe fault zones, and the relationship between the geometric characteristics and the seismic activity of the fault zones is quatitatively discussed. Moreover, using the SEM research method for quartz grains from fault gouges, the Holocene activity of some segments of the fault zones is discussed in combination with the macroscopic investigation data, and several microscopic dynamic structures that presumably represent the existence of paleoearthquake events are identified.