In the face of task demand and international market competition, on the basis of existing large satellite platform of about 5000 kg and 8000 kg, it is urgent to develop a new generation of large bearing satellite platform in geostationary orbit with large bearing capacity of 9000 kg–11000 kg. The platform adopts an integrated configuration design of central continuous force transmission to meet the requirements of load subsiding installation and reduce the weight of the structure. It adopts a tiled and large capacity of storage tank with subsiding installation design to enhance the longitudinal stiffness of the support structure. It also adopts a lightweight, large load-bearing and uniform heat integrated grid cylinder to solve the heat dissipation problem of large machines and meet the lightweight requirements. The analysis results indicate that the platform structure design meets the strength requirements during the launch process of the launch vehicle. The passing of the static test on identification test of structure and the vibration test on identification test of the entire satellite also verified the rationality of the platform structure design. The bearing capacity of the platform can be expanded to 12000 kg, which can provide reference for the design of the structure of the subsequently large bearing satellite platform in geostationary orbit.