Pay-off support

The invention relates to a pay-off support. The pay-off support comprises a portal frame and supporting transverse steel. The portal frame comprises two vertical stand columns and a transverse jackingcolumn, and the top ends of the two vertical stand columns are correspondingly and fixedly connected to the two ends of the transverse jacking column; the bottom ends of the vertical stand columns are connected to the supporting transverse steel; rolling wheels are arranged on the supporting transverse steel; hoisting hoists are arranged on the vertical stand columns, steel wire ropes of the hoisting hoists are connected to positioning sliding blocks through reversing pulleys, the positioning sliding blocks are arranged on the vertical stand columns, second positioning holes are formed in thepositioning sliding blocks, a plurality of first positioning holes are formed in the vertical stand columns, and the second positioning holes are matched with the first positioning holes through plugpins; ball bearings are fi