Based on the earthquake activities recorded by the Hetian small-aperture seismic array from January 1 to June 30, 2015, in this study, we analyzed the waveforms and positioned the source of these events using the linear inversion method and the software swa to obtain a complete artificial earthquake catalog. Next, we used MSDP software and the simplex location method to compute and analyze the earthquake activities recorded by the Xinjiang Seismic Network. Then, we analyzed the seismic record of the Xinjiang Seismic Network within 200 km around the Hetian small-aperture seismic array and compared our results with those recorded by the array to determine the monitoring capacity of the Hetian small-aperture seismic array. Based on our results, we conclude that the low limit of the earthquake monitoring capacity in the Hetian array has a magnitude of -2.19, within a 500 km range its magnitude is less than 1; and within a 800 km range its magnitude is less than 2.