Mounting device of jacking oil cylinder for large engineering machinery

The utility model discloses a mounting device of a jacking oil cylinder for large engineering machinery, which comprises a bottom support and a supporting seat fixedly arranged on the bottom support and used for supporting the jacking oil cylinder, the jacking oil cylinder is provided with a mounting flange located at the bottom end, a connecting base located at the bottom of the mounting flange and a ball head protruding and extending downwards from the connecting base, the supporting base extends in the vertical direction and is provided with a hollow cavity extending in the vertical direction, and the inner diameter of the hollow cavity is smaller than the outer diameter of the mounting flange and larger than the outer diameter of the connecting base. When the jacking oil cylinder is supported on the supporting base, the mounting flange is supported on the top of the supporting base, the connecting base and the ball head are contained in the hollow cavity, and an adjusting assembly used for adjusting the p