Abstract: The progress in numerical simulations of separation and vortical flows on delta wings (including double-delta wings, strake-delta wings and close-coupled canards) was summarized in this paper. The numerical methods using Euler equations and N-S equations in the simulations for the configurations of complex vortical flows and structures of separation flows on different delta wings under the conditions of different angle of attack and flow M numbers are reviewed. The effects of control equations, grids, turbulence model and numerical methods on the results were also discussed.