In the west margin of the Ganjia Basin, which is located at the western end of the northern margin fault of West Qinling fault, three nearly SN-trending faults (east branch, middle branch, and west branch) were developed, showing an arc landform ladder with high west and low east. Based on the interpretation of high-resolution satellite remote sensing images, geological and geomorphological survey, UAV aerial measurement, and profile cleaning and ¹⁴C dating, evidences of new activities in late Quaternary were found along the west margin fault zone of the Ganjia Basin. The new fault activities were characterized by different levels of fault scarps, faulted terraces and diluvial platforms, and right-lateral gullies and terraces. The profile and scratch of faults revealed that the western margin fault zone of the Ganjia Basin has the property of dextral thrust, and the latest stratum of fault dislocation is Holocene. According to the UAV measurement and dating data, the average horizontal right-lateral slip rate of the west branch of the west margin fault of Ganjia Basin since the middle Holocene is estimated as 0.89 mm/a, while the average vertical slip rate is 0.30 mm/a.