On November 5^th, 2009, an earthquake of M_L 4.8 happened in Gaoling, ShaanxiProvince. This article summarizes the parameters and sequence character of the earthquake, and calculates the focal mechanism solution from initial P-wave data, and also analyzes the Seismic intensity according to the study results of earthquake zone. We study the seismogenic structure of the earthquake using the combination of geological structure, focal mechanism, after quake distribution, and the meizoseismal area’s long-axis direction. Finally, we draw a conclusion that this earthquake took place on the Jingyang-Weinan fault zone.