Using the layered viscoelastic medium model,this paper calculates the Coulomb stress loading effect on the Lushan epicenter generated by the Wenchuan earthquake. With the help of the rate-state friction law proposed by Dieterich(1994),we obtain the probability of M_W>6.0 earthquake occurring in the vicinity of Lushan. The results show that the probability of M_W>6.0 earthquake of Lushan region in 2013 is 18%,indicating that the stress disturbance caused by the Wenchuan earthquake accelerated the Lushan earthquake. This paper also calculates the Coulomb stress accumulation on the "seismic gap" generated by the Wenchuan,Lushan earthquakes,and gives the M_W>6.0 earthquake probability of "seismic gap" on the basis of the background seismicity. Although there may be a certain error in the results because of the Dayi earthquake,selection of the medium model parameters and background seismicity,the seismic probability of "seismic gap" is increasing and we believe that destructive earthquakes are still likely to occur in the "seismic gap".