The invention discloses a device used for grinding and polishing small sample hard sheets. The device comprises a repairing disk ring and a sample carrying disk. A plurality of fixing holes are formed in the surface of the repairing disk ring and distributed in the surface of the repairing disk ring in a central symmetry manner; or one of the fixing holes is formed in the centre of the repairing disk ring, the other fixing holes are distributed in the central symmetry manner, and the fixing holes in the repairing disk ring are formed according to the size of samples needing to be ground and polished. A groove with the outer diameter smaller than that of the bottom of the repairing disk ring is formed in the bottom of the repairing disk ring, and a plurality of liquid draining grooves are formed in the periphery of the bottom of the repairing disk ring. By means of the device, the single small sample can be ground and polished or the multiple small samples can be simultaneously ground and polished; meanwhile, the grinding precision is guaranteed, and influences of sample deformation on the polishing quality are avoided; and when the samples with the large hardness are ground and polished, the grinding efficiency and the grinding quality can be improved through balance weights.