In recent years, modern prestressing technology has been more and more widely used in space grid structure. By applying prestressing in spatial grid structure, it can greatly improve the stiffness of the structure, save steel and reduce the total cost of the project; at the same time, it can enable architects to give full play to their imagination and design more beautiful structural modeling, so it has good social and economic benefits. As a new achievement of architectural discipline, the development prospect of this new structural form is broad, but there are many contents that need to be explored in-depth theory.