Hydraulic climbing formwork jack

A hydraulic climbing formwork jack is composed of an oil cylinder, a climbing rod, an inner steel frame and an outer frame pull rod, the oil cylinder is composed of a lower cover, an inner barrel, a cylinder barrel, a piston and an upper cover, a through hole is formed in the oil cylinder, the climbing rod penetrates through a piston rod of the oil cylinder and the inner barrel, the inner steel frame is fixed to a supporting plate at the upper end of the climbing rod through an upper clamping head, and a sliding block is arranged between the upper clamping head and the climbing rod. The upper end of the outer frame pull rod is fixed to the top plate above the supporting plate through a screw, the lower end of the outer frame pull rod is connected with a building pouring formwork, the lower portion of the climbing rod is connected with the building pouring formwork through a safety clamping head, and a piston rod of the oil cylinder is fixedly connected with the climbing rod through a lower clamping head. Acco