| The interaction analysis of superstructure-foundation-soil for high-rise buildings is an attentive subjuct. Box foundation is gradually regarded as a perfect foundation form for high-rise buildings, with good intergrity,strong seismic ability,high bearing capacity and efficient adjusting uneven settlement as well. The subject in this paper is the interaction analysis of frame structure-box foundation-soil. At present, the method and practice of the interaction analysis of frame structure-box foundation-soil have many defaults,which needs further research. For actuality,the main researches are outlined as following:(1) In this thesis, while the walls in the box foundation is disposaled evenly, the design method of supporting pile bearing loads by friction is presented.(2) In this thesis, the design method of base and top slab in box foundation considering the interaction is put forward.(3) In this thesis, an improved soil model of Wrinkler is presented, while is used in the Marc model.(4) Supposing the box foundation as the utterly rigid foundation, a method for caculating react force, settlement and lean for the box foundation is presented in this thesis.(5) In this thesis, the method is discussed, which can improve the precision of calculation for the Marc model, including partitioning the element in reason, choosing the element shape in reason and substituting the load in reason.(6) By some typical engineering sample builded in Marc, it is analysed that the settlement, reactive force and internal force in structure for different loads, floors, the span, the stiffness of soil, the wall ratio, the ratio of foundation's size, the form of arranging piles. Some essential rules of internal force and settlement in superstructure and foundation are obtained by analysing the different parameter of superstructure, foundation and soil. Aiming at some important rules, some useful suggestions are presented for engineering practice, which make the design of engineering more economical and secure.
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