Scientific surveys conducted after the Minxian-Zhangxian M_S6.6 earthquake reveal that the overburden thickness and topographic conditions at local sites in its meizoseismal area have a significant amplification effect on the ground motion. Using a servo velocity seismograph, we conducted a high-density microtremor survey in sites around the meizoseismal area, and obtained the predominant frequencies of the various sites. We used the frequency spectrum analysis method to obtain the overburden thickness distribution of the sites, and investigated the unmanned aerial vehicle telemetry of the area to obtain topographic and geomorphic data. By producing surface and bedrock data from the digital elevation model, we used the Rhino 3D modeler to further process and establish a terrain model and then generated a 3D model of the actual terrain using general finite element software.