Abstract: Taking Xiao Tiancheng 57-story tall steel structure as background，harmonic superposition method and MATLAB were used to simulate fluctuating wind speed curve and fluctuating pressure curve in the class B topography． The structure calculation model was established by the finite element software MIDAS Gen to analyze structural wind induced vibration of the structure under along-wind pressure． The results showed that the vertex peak acceleration of the structure calculated by the FE software was basically agreed with that by the formulas in National Building Code of Canada and Chinese Technical Specifications of Civil Tall Building Steel Structure ( JGJ 9998) ． According to Chinese Load Specification of Building Structure ( GB 500092012) ，the vertex peak acceleration of Xiao Tiancheng project could meet the requirements of specification limits when structural damping radio of steel house was taken as 0. 02．