Polishing device for glass fiber reinforced plastic winding tank

The utility model relates to the technical field of oil field storage tanks, in particular to a polishing device for a glass fiber reinforced plastic winding tank, which comprises a rack, a polishing machine and a polishing head arranged on the polishing machine, the rack comprises a cross beam, a connecting rod, a telescopic rod, a rotating block and a longitudinal beam, one end of the cross beam is horizontally and rotatably connected with one end of the connecting rod, and the other end of the cross beam is horizontally and rotatably connected with the polishing machine. The two ends of the telescopic rod are horizontally and rotationally connected with the cross beam and the connecting rod correspondingly. The other end of the connecting rod is horizontally and rotatably connected with one end of the rotating block in a lockable manner, and the other end of the rotating block is vertically and rotatably connected with the middle part of the longitudinal beam; the upper end and the lower end of the longitu