Folding workover rig base

The utility model relates to the technical field of petroleum equipment, in particular to a foldable workover rig base. Comprising a top layer, folding type middle-layer stand columns, a bottom layer and diagonal draw bars, one ends of the folding type middle-layer stand columns are hinged to the top layer, the other ends of the folding type middle-layer stand columns are hinged to the bottom layer, and one ends of the diagonal draw bars are hinged to the top layer. The upper piece frame and the lower piece frame of the folding type middle-layer stand column are movably connected through lug plates on the two sides, when the folding type middle-layer stand column is lowered, a diagonal draw bar and a lug plate pin shaft of the lug plate on one side of the folding type middle-layer stand column are dismantled, a traveling system of a crane or a workover rig is connected with a special lifting lug on the top layer, the top layer is lowered, and the folding type middle-layer stand column is folded. In the liftin