Abstract: In the preconstruction of super high-rise steel structure， the excavation was done around the tower，in order to ensure the late lifting equipment installation，transport vehicles entering the area and start construction，it is necessary to set up temporary platform as the hoisting machinery working platform． Large hoisting equipment is designed for ultra conventional load，the last method is to design a concrete platform，but its construction cycle is long，waste materials and not environmentally friendly． A steel structure platform was designed and MIDAS software simulation design was used to do simulation analysis，It was analyzed the platform deformation stress and stability of the large truck crane for its operation in the most unfavorable condition，thus obtaining the platform stress and deflection value in the construction stage． After complete the steel platform construction，the simulation values and the measured values of a 500 t truck crane for its operation on the platform were compared，the results show that the design and simulation analysis of steel platform is correct，this method not only ensures the safety of construction，but also provides references for the similar project construction.