Abstract: A project of Beijing design for multi tower structure with a large podium building group, there is big height difference among towers, and the core tube and frame column foundation of same tower bearing capacity difference of abnormal disparity, according to special requirements of the construction structure, by variable stiffness adjustment foundation treatment design of successful application, both greatly improve the natural foundation bearing capacity and reduce building subsidence and resolve differences in construction settlement is too large, but also to create a good economic and social benefits, also for engineering application in Beijing area with similar geological conditions of accumulated valuable experience.