Cable pay-off device for rapid erection of power grid

The cable pay-off device comprises a bottom frame and a top plate, a bottom plate is arranged on the bottom frame, steel pipes which are symmetrically distributed are installed on the bottom plate, the tops of the steel pipes are connected with the top plate, movable columns are arranged on the steel pipes in a sleeved mode, supporting plates are arranged on the two movable columns, and the supporting plates are connected with the bottom plate. A bolt for supporting the movable column is arranged on the steel pipe, the supporting mechanism comprises a movable rod, a stabilizing column, a nut, a base plate, a movable hole, a screw rod and a fixing plate, and the fixing plate is installed on the bottom frame; the supporting mechanism has the advantages that the supporting plate is further supported through the designed supporting mechanism, bolt damage caused by supporting the supporting column independently through a bolt is reduced, and the replacement cost is reduced; through the designed sliding part, when