The separated manual hydraulic jacks adopt new architecture, and high-quality material selection with many features, like new structure, long services life, convenient repair, which are upgrade and alternative products. It is widely used in power maintenance, bridge repairing, heavy lifting, static pressure column, foundation settlement, bridges and ships repairing, especially in railway and highway construction, adjustment, removing equipment. Single-acting, spring rebound, the surface of chrome plated plunger, groove plunger need not set up saddles. The design of compact, flat, small appearance uses in occasions where other hydraulic cylinders are not applicable, particularly using in the narrow place. It has some features in portable, flexible, strong force.