Some new insights into the relationship between the Coulomb failure stress changes and the observed events after the Wenchuan earthquake are gained.Three improvements are made in the calculation to achieve this goal including employing a triangular dislocation element method,setting up a much more realistic slip source model as well receiver faults model and resolving stress change on variable focal mechanisms.The Coulomb stress changes due to the2008Wenchuan destructive earthquake have shown that besides the three major faults systems which is in agreement with the results of Toda et.al.(2008),eastern segment of Longriba gained a large stress increase and showed to be extremely dangerous.Ya’an is located in the southwestern triggering lobe of the main rupture which indicates that the Wenchuan Earthquake may be responsible for the Lushan even.The focal mechanism for Lushan earthquake received a stress increase by about0.1bar which also clearly proved that the Wenchuan earthquake has effectively promoted it.In our case,the spatial distribution of aftershocks does not match well with the zones with increased stress except for the two ends of the main rupture.It can be attributed to many factors including dynamic stress triggering,small faults with complex orientations,oversimplified fault slip model,heterogeneities of crust,poorly located aftershocks.