In this paper we go into in detail the surface microtextures of quartz grain from fault gouge of three active fault in the Minle Basin, and discuss sliding behavior and relative ages of these faults based on the surface characteristics of quartz grains. Results indicate that the central segment of the Yingluoxia fault is in stick slip, but both its two ends are in creep slip. Paleoearthquakes located in the central segment of the fault (Heihekou) occurred approximately in the late pleistocene or early Holocene. The Cihu Fault in the region is recently active, its feature of stick slip is clear. It is presented that the old Qingshuigou Fault occurred in the Sinian period also was active during Holocene epoch.