Based on the stress failure of a hollow slab bridge, a design scheme of replacing the hollow slab with a post-tensioned prestressed T-beam with variable height is proposed. The beam end of the structure scheme is equal to the height of the original hollow plate beam, and the height of the middle span beam is increased appropriately, so that the bridge span structure can be renewed without changing the elevation of the original bridge floor. For this reason, the rib spacing of T beam is sealed in the section structure (smaller than that of general transverse assembly T beam), the prestress reinforcement is optimized, and two shear reinforcement structures "embedded steel plate" and "shear reinforcement skeleton" are designed at the end of T beam, which can provide reference for the renovation design of similar projects.