Abstract: The identification of earthquake events is very important in seismic tomography. However, during searching earthquake event from the huge earthquake data base acquired by portable array, the traditional manual method of identifying earthquake events is very inefficient and time-consuming. This paper uses STA/LTA method to judge the existence of earthquake event preliminary, uses the Support Vector Machines and the multi-station joint inspection to improve the accuracy of earthquake event discrimination and anti-jamming capability, and then earthquake event can be identified from huge earthquake data bank. Finally, this technique is applied to the Nanling portable seismic array data, and the result shows that the method can determine earthquake events automatically, quickly and accurately, and then the event data can be used for phases identification further.