On April 20, 2013, a M_s 7.0 earthquake happened in Lushan, Sichuan Province, which killed and hurted hundreds of people, also resulted in huge financial loss. People usually cared about the changes of coulomb failure stress caused by the earthquake, and the effect on the adjacent faults, and subsequent progress after this earthquake. Based on seismic static triggering principle, the elastic dislocation theory, layered crustal model, we used the USGS focal mechanism solution, the coseismic coulomb failure stress is 1.0MPa to 0.1kPa from fault poane to 200km, stress was released in most of the area, however, the Daofu and Yulongxi segment of Xianshuihe fault became more dangerous.