Clamp for polishing notebook computer shell

The utility model is applicable to the technical field of computer shell processing, and provides a clamp for grinding a notebook computer shell, a second motor drives a grinding disc to grind four corners of the notebook computer shell, and a transmission assembly is arranged beside the second motor. The second motor drives the upper magnet tray to rotate through the transmission assembly, a computer shell is placed above the lower magnet tray, the first motor and the power assembly are matched to drive the lower magnet tray to ascend and move rightwards to be close to the upper magnet tray, and the shell is clamped and fixed through the two trays. In addition, due to the fact that the two trays are attracted together through magnets, then a second motor is started to drive a grinding disc to grind the four corners of the shell, after one corner is ground, an electric rod is powered on, the electric rod is pushed rightwards, four bevel gears are meshed together in pairs, the two trays are driven to rotate th