The utility model provides an end sealing formwork for an underground comprehensive pipe gallery deformation joint. The end sealing formwork comprises a main body structure and side wall formworks onthe two sides of the main body structure. Wherein the main body structure comprises an aluminum box template and a C groove template correspondingly arranged on one side of the aluminum box template;a rubber waterstop is mounted in a gap between the C-groove template and the aluminum box template; the side wall formwork and the C-groove formwork, the C-groove formwork and the aluminum box formwork, and the side wall formwork and the aluminum box formwork are connected through 90-degree angle aluminum formworks. The rubber waterstop fixing device is convenient to assemble and disassemble, easyto operate, good in overall stability and high in strength; and the concrete appearance effect is good after form removal, the structural size is accurate, the position of the rubber waterstop is accurate, the compactness of the underground comprehensive pipe gallery at the position of the deformation joint is guaranteed, and therefore the phenomena of water seepage and water leakage at the position of the deformation joint in the later-period use process of the underground comprehensive pipe gallery are greatly reduced.