Grinding and polishing clamp

A grinding and polishing clamp comprises a double-cross-shaped clamping jaw, a limiting groove, a clamping mechanism, a tray, a mounting grabbing plate and a telescopic rod. The limiting grooves are formed in the upper surfaces of eight clamping jaws of the double-cross-shaped clamping jaw, the clamping mechanism is slidably connected into the limiting grooves, the bottom end of the telescopic rod is fixedly connected to the upper surface of the middle of the double-cross-shaped clamping jaw, and the tray is fixedly connected to the top end of the telescopic rod. The installation grabbing plate is fixedly connected to the lower surfaces of the tail ends of the eight clamping jaws of the double-cross-shaped clamping jaw. Compared with the prior art, the grinding and polishing clamp has the advantages that the clamping position can be conveniently adjusted, glass in various shapes except a rectangle can be clamped, and the grinding and polishing clamp can be fixed, so that the gravity center of the glass is sta