The seismic intensity of the Jiuzhaigou M_S7.0 earthquake is 9 degree, but the damage on the surface is relatively small, and the far field feel is relatively strong, and relatively accurate to determine the focal depth. The paper studies the 2015 Sichuan model and several commonly used embedded Msdp seismic location method to re position the Jiuzhaigou earthquake. The focal depth comparison results show that the PTD method can be used to verify the appropriate focal depth, and obtain the more reliable focal depth. The final focal depth is determined to be about 12km±2km.