Jacking device suitable for special-shaped structure

The invention belongs to the technical field of engineering machinery, particularly relates to a jacking device suitable for a special-shaped structure. Aiming to solve the problem that an existing jacking device is not easy to stably jack a special-shaped structure, the following scheme is provided, the jacking device comprises a supporting base, and the outer wall of the center of the top of the supporting base is connected with a first hydraulic cylinder through a bolt; and a first supporting plate is arranged at the top of the first hydraulic cylinder, supporting columns are connected to the outer walls of the four corners of the top of the first supporting plate through bolts, and the outer walls of the tops of the four supporting columns are connected with the same supporting top plate through bolts. The jacking device suitable is firstly placed at the bottom of the special-shaped structure, then a second hydraulic cylinder is contracted, fixing clamping plates are made to rotate towards the interior of