Hard alloy roll

The invention discloses a hard alloy roll, comprising a roller that is installed outside a revolving shaft and provided with an annular groove, the annular groove is internally inlaid with a hard alloy mosaic block, the revolving shaft and the roller are internally provided with cooling channels communicated with the annular groove, and sealing rings are respectively arranged along the inner wall of the annular groove on two sides of the hard alloy mosaic block. Compared with the prior art, the hard alloy roll can solve the problems that a current hard alloy roll is easy to pull a hard alloy workpiece due to overheating caused by high-speed revolution.