Gear's grids are divided by using finite element pre-processing software Hypermesh,and ANSYSWorkbench is applied to analyze gear's meshing static contact mechanical features. Based on the tooth flank static contact mechanical analysis,we worked out cone gear's stress change and stress deformation finally. The contact performance of gear is analyzed by invented rolling test,which is consistent with flank static contact mechanical analysis,it's further verified the correctness of the static analysis.