GB/T 6060.2-2006 provides for the comparison of surface roughness of grinding, turning, boring, milling, inserting and planing processing samples. It specifies the material and process of the sample block production to ensure that the sample block can accurately reflect the surface characteristics under the corresponding processing method. The asperity value range of each processing type sample block is detailed, covering a variety of Accuracy grades from low to high. In actual use, the asperity level can be quickly judged by comparing the processed surface with the sample block. This standard provides an intuitive and reliable basis for mass inspection in the machining industry, which helps to control the surface mass of the product and improve the processing technology level.