Taking the super high-rise system of single outrigger as the research object, using a certain building as the actual engineering background, and finite element software PKPM is used for modal characteristic analysis. Through the comparative study of the seismic performance of the super-tall buildings using the buckling-restrained brace outrigger truss system and the common outrigger truss system, including the study of the angle of inter-laminar displacement, cycle, stiffness ratio, abrupt change of the outrigger layer stiffness and other problems under the level of frequent earthquakes(Seismic intensity with a 63% probability of exceedance in 50 years and the comparison of the regularity of the structural system, the lateral stiffness of the structure, and the maximum shear force of the structural reinforcement layer. It is found that the buckling-restrained brace outrigger truss structure can solve the abrupt change of vertical stiffness and vertical bearing capacity caused by stiffening layer, and the structural system has better regularity and seismic performance.

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