The　Rayleigh-Taylor　instability　with　high　density　ratio　is　numerically　studied　for　the　non-viscous　Euler　equations　as　the　modeling　equations　by　using　the　high　order　finite　volume　weighted　essentially　non-oscillatory　(FV-WENO)　schemes.　Gradually　increasing　the　density　ratio　and　encrypting　meshes,　the　effectiveness　is　verified　for　the　FV-WENO　schemes　simulating　the　high　density　ratio　Rayleigh-Taylor　instability　by　comparing　with　the　high　order　finite　difference　weighted　essentially　non-oscillatory　(FD-WENO)　schemes.　Numerical　results　indicate　that　the　density　distribution　of　two　schemes　is　largely　same　with　clear　graphics,　good　symmetry　and　high　resolution.　And　furthermore,　when　the　density　ratios　are　1:30　and　1:300,　the　interface　frontier　of　the　density　distribution　moves　faster　for　higher-order　FV-WENO　schemes　than　the　FD-WENO　schemes.　When　the　density　ratio　is　1:3,　the　density　distribution　of　the　five　order　FV-WENO　scheme　with　the　consistent　grid　600120　is　similar　to　that　of　five　order　FD-WENO　scheme　with　the　consistent　grid　1200240,　the　similar　results　are　shown　in　Jing,　Zhang　and　Shu＇s　coworks　for　FD-WENO　schemes.　©　2021　ACM.