The hydraulic jacking system is mainly composed of four major parts: the main body, which consists of two double-acting hydraulic cylinders; the hydraulic pump station, which is equipped with either a diesel pump station or an electric motor pump station; the support plate, which serves to secure the machine and support the pit wall; and the jacking rod and pulling 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, and 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 small and medium-sized non-excavation construction companies.