Based on mobile deformation data cross the fault and using grey relation degree analyze method, the authors got the synthetic index for strike-tensile-vertical activity parameters of Xianshuihe Fault. The results showed that: 1) Xianshuihe Fault mainly is left-lateral strike-slip fault; 2) the curve of activity parameters accumulation showed the anomaly variation of speeding up or turning before Xiaojin M_S 6.3 and Yajiang M_S 6.0 earthquakes; and 3) the authors observed the adjustment influence on the Xianshuihe Fault after the M_S 8.1 earthquake at the Western Pass of Kunlun Mountains, stress field intensifying or disturbing influence on Xianshuihe Fault before the Wenchuan M_S 8.0 earthquake, and left lateral accelerating influence on Xianshuihe Fault after the Yushu M_S 7.1 earthquake in short-time.