The invention relates to a jacking device. The jacking device is characterized in that a surface framework, a jacking cylinder, guide columns, sliding guide assemblies, guide bases and a base are included; the jacking cylinder is arranged in the center of the base, a piston rod of the jacking cylinder is vertically upward, and the four corners of the base are respectively provided with one guide base; the surface framework is arranged above the base, the center of the surface framework is fixedly connected with the piston rod of the jacking cylinder, the four corners of the surface framework are respectively provided with one vertically downward guide column, and the guide columns and the guide bases are arranged in a one-to-one correspondence mode and are connected and matched through the sliding guide assemblies. The jacking device is simple in structure, convenient to use, stable in jacking and high in reliability, can improve product assembly precision easily, and lowers equipment maintenance cost.