Assembled split grinding wheel

The utility model discloses an assembly type split grinding wheel which comprises a grinding wheel body and splicing grinding wheels, the grinding wheel body is located below the splicing grinding wheels, the two splicing grinding wheels are arranged above the grinding wheel body, a first inner ring is arranged in the grinding wheel body, and second inner rings are arranged in the splicing grinding wheels. The left side and the right side of the upper surface of the grinding wheel body are each provided with a front first threaded groove and a rear first threaded groove, the left side and the right side of the upper surface of the splicing grinding wheel are each provided with a front second threaded groove and a rear second threaded groove, and threaded columns are arranged in the first threaded grooves and the second threaded grooves in a penetrating mode. A supporting sliding rod is arranged in the middle of the bottom of the clamping block in a penetrating mode, and an elastic device is arranged outside t