The hydraulic jacking assembly is mainly composed of four major parts: the main body, consisting of two double-acting hydraulic cylinders; the hydraulic pump station, equipped with diesel pump station and electric motor pump station; the support plate, which fixes the machine and supports the pit wall; and the jacking rod and pull head, which are used for jacking in and pulling out to enlarge the bore. The series includes models such as 60T/3, 80T/3, 100T/3, 120T/3, with bore diameter ≤ φ850mm and construction distance ≤ 120 meters. The machine is easy to operate, has a long service life, and is easy to maintain, making it an essential tool for medium and small non-excavation construction units.