Integral seamless repairing device for multi-roll mill backing roll

The utility model relates to an integral seamless repairing device for a multi-roll mill backing roll. The device comprises a clamping fixture arranged on a workbench (2). The clamping fixture comprises a fixed base (1) for supporting a backing roll to be ground. A compressing roll driving device provided with a power mechanism and a transmission mechanism and compressing devices which has the same number as that of the bearing rolls on the backing roll and are positioned on one side or two sides of the backing roll to be ground are arranged on the fixed base; a V-shaped or arc-shaped groove (29) with a shape matched with the shape of the bottom plate of the backing roll is formed at the upper end of the fixed base (1). The device provided by the utility model can conduct integral seamlessgrinding and integral molding grinding of the backing roll to be ground, and has the advantages of simplified procedures, high precision and low cost.