A M_S5.0 earthquake occurred on June 03, 2017 in Alashan County, Inner Mongolia. During the earthquake, 150 three-component acceleration records of the main shock were obtained from 50 strong motion seismographs in Gansu Strong Motion Network. Based on these records, we first calculated the distribution of peak accelerations around the epicenter. The basic characteristics of this earthquake were analyzed according to the acceleration time-history curves and acceleration response spectra recorded by four typical stations. Further, the attenuation relation between PGAs and spectral accelerations with different distances were analyzed by comparing the observed data with Italy 08-ground motion prediction equations. The spectral ratio curves were calculated based on strong motion data from the four stations. It was found that by comparing the spectral ratio results with the borehole information from these four stations, the spectral ratio method could accurately reflect the actual site situation.