After the "8.8" earthquake in Jiuzhaigou, the aftershocks have continued, posing a great threat to the safety of people"s lives and property in the disaster areas. It is of great significance to carry out aftershock monitoring research. Through the analysis of the ground motion response of different types of foundations and different elevations of Xuejiaba, it is revealed that the peak acceleration>2# monitoring point>reference point recorded in the 1# monitoring point of the deep overburden site indicates the local range. The amplification effect of different ground types on seismic waves is more significant than the terrain amplification effect; the maximum value of Arias intensity of 1# monitoring point is 2# and 1.5 times and 5.1 times of reference point respectively, while 2# monitoring in the same foundation condition The maximum Arias intensity is about 3.5 times of the maximum value of the reference point; Fourier"s spectrum analysis shows that the deep-coverage site has a stronger amplification effect on seismic waves than the complete bedrock site, and the 2# monitoring point has the same elevation and different depths to seismic waves. With selective amplification, the closer to the hole, the more obvious the amplification effect.