Two　reinforced　concrete　core　wall　models　with　large　height-width　ratio　were　built　and　tested　to　failure　under　the　combined　action　of　constant　axial　load　and　reversed　cyclic　lateral　load.　The　axial　load　ratio　on　each　core　wall　is　different.　This　paper　presents　the　results,　including　the　failure　mode,　hysteretic　behavior,　load-carrying　capacity,　ductility,　energy　dissipation　ability,　shear　lag　effect,　etc.　Finally　axial-load　ratio　is　found　having　an　important　effect　on　the　seismic　behavior　of　reinforced　concrete　core　wall.