The numerical method is used for calculating the effects of slip boundary conditions on the viscous flows over blunt bodies at different altitude The nonequilibrium viscous shock-layer equations are used as the governing equations，the boundary conditions include shock-slip，wall-slip and no slip conditions. The numerical results show that the shock stand-off distance is thicker as slip boundary conditions are considered，and the value of electron number density behind the bow shock is not zero. The numerical resu1ts are pesented and compared with those from other methods.