关键词高层建筑水平加强层抗侧刚度侧移控制最佳位置 I Abstract High buildings of our country grows vigorously in recent years, and their characteristics are higher height, plicated forms, plete functions and prehensiveness. Structural lateral displacement es the main control index due to greater influence of horizontal loading to high-rise structures. 20th century at the beginning of the sixties, in order to decrease structural lateral displacement, putting up horizontal strengthened stories have made better economy and structural effect in North America, Europe, Japan and other places. Engineers of our country adopt this kind of structure and constructed some large-scale constructions in recent years, and this kind of structural system have been used in our country. Study of effect mechanism and analysis of optimum location on putting up horizontal strengthened stories have very important realistic meaning for producing the direct economic benefits. According to requirements of ‘Technology Regulations on High Buildings Structure’, Function mechanism of decrease structural lateral displacement, of enhance resist-lateral rigidity and optimum location on putting up horizontal strengthened stories have been analysed aiming at different structure forms and different calculate