The　built-in　steel　plate　concrete　composite　shear　wall　is　mainly　used　in　super　high-rise　building　structures,　and　is　the　main　component　to　resist　lateral　force.　The　shear　wall　at　the　bottom　often　bears　huge　vertical　load.　Therefore,　the　axial　compression　ratio　and　concrete　strength　are　the　main　factors　affecting　its　seismic　performance.　In　order　to　investigate　the　seismic　performance　of　high-strength　concrete　composite　shear　walls　with　built-in　steel　plates　under　high　axial　compression　ratio,　two　specimens　with　shear-span　ratio　of　2.28　were　tested　under　cyclic　loading.　The　designed　axial　compression　ratio　was　0.6　and　0.8,　respectively,　and　the　concrete　was　C70.The　mechanical　behavior　and　failure　modes　of　the　composite　shear　walls　under　cyclic　loading　were　studied,　and　the　influence　of　axial　compression　ratio　on　seismic　performance　was　analyzed.　The　results　indicate　that　two　specimens　suffered　from　compression　bending　failure,　and　the　failure　sections　conform　to　the　assumption　of　plane　section.　The　hysteretic　curves　are　full,　the　energy　dissipation　capacity　is　good,　and　the　horizontal　bearing　capacity　is　relatively　stable.　With　the　increase　of　axial　compression　ratio,　the　horizontal　bearing　capacity,　initial　stiffness,　and　energy　dissipation　capacity　of　composite　shear　walls　increase,　while　the　lateral　deformation　capacity　decreases,　but　the　yield　displacement　drift　is　still　greater　than　1/120,　and　the　ultimate　displacement　drift　is　1/46.This　study　provides　a　theoretical　reference　for　engineering　application　of　high-strength　concrete　composite　shear　walls　with　built-in　steel　plates.　©　2020,　Editorial　Office　of　China　Civil　Engineering　Journal.　All　right　reserved.