Prefabricated modular building structure. The tenon and mortise design concept of ancient buildings in China was used for reference in rock earthquake resistance. By connecting the side beams of the box body to a certain extent, the structural rigidity is increased, and the lateral support that does not affect the use function is set to increase the overall seismic rigidity of the structure. It is a structural system of prefabricated modular buildings, which is jointly developed by Huawei Digital Energy Company and Tongji University.