Abstract: Tianjin R ＆ F Center is a landmark building of Xiaobailou district, 4 floors underground, 2200-metershigh towers up the ground. The structural system of the 54-storey apartment tower is steel brace framework-core tube structure system. The main lateral resistant structure of X direction is reinforced concrete tube, and of Y direction is a combination system of steel brace framework and reinforced concrete tube. The steel brace framework is a combination of rectangular concrete-filled steel tube columns, rectangular steel braces and H-shaped steel-concrete composition beam. For the super-tall building, different kinds of lateral resistant structures are used in X and Y directions, ratio of H/B of concrete filled steel tube column is beyond 2.0, it is presented in detail the structural systems and members.