Determining the geometric characteristic and slip rate alongactive faults is essential to understand fault dynamic mechanism and evaluate regional earthquake hazard. The left- lateral strike- slip Xianshuihe fault in eastern Tibet is one of the most active intra- continental faults in China, acting as a significant boundary fault controlling eastward material extrusion from Tibet. Here, we determined the offsets and abandonment ages of Longdeng terraces on the Qianning segment, NW Xianshuihe fault, using tectonic- geomorphology approaches (high- resolution remote sensing images and field investigation, LiDAR (Light detection and ranging) with OSL (Optically stimulated luminescence) and 14C dating. Yielded the abandonment ages of 11±1 and 7±1 ka for T4 and T3′, respectively. Horizontal offsets measured on the high- resolution DEM (Digital elevation model) obtained from our LiDAR surveys are 106±5 and 77±2 m for T4/T3′ and T3′/T1, respectively, and the vertical offset of T4 is 9. 6±0. 5 m. Combining the terrace ages with their offsets, we obtain an average late Quaternary horizontal slip- rate of 10. 5±1 mm/a, and a throw rate of 0. 9±0. 1 mm/a. In addition, by recalculating the fault parallel component of GPS vectors on both sides of the fault, we derive a horizontal rate along the Luhuo, Luhuo- Kangding, and Moxi segments of 8. 1, 8. 2, and 9.4 mm/a, respectively, suggesting that the slip rate along the Xianshuihe fault currently increases from NW to SE. Combining the slip- rate we determined along the Qianning segment with empirical equations of maximum offsets and earthquake magnitude, we suggest a seismic risk of a MW 6. 8 (MS 7. 2) earthquake in the near future along that segment of the Xianshuihe fault, which should be taken seriously in the earthquake disaster mitigation.