Abstract: To study the dressing process of diamond grinding wheel, the diamond grinding wheel is dressed by green silicon carbide grinding wheel with grinding dressing method. By changing the dressing quantity, dressing speed ratio, cutting feeding, speed of workbench, the influence law of dressing parameters on grinding wheel grinding effect is concluded. The research results show that the workpiece surface roughness increases with the amount of trimming, and the roughness changes little when the amount of trimming increases to a certain number of times; the workpiece surface roughness increases with the increase of dressing speed ratio; when the cutting feeding increases, the workpiece surface roughness increases; and when the workbench velocity increases, the workpiece surface roughness increases. It provides a practical and effective reference value for selecting the technological parameters of dressing the diamond grinding wheel with green silicon carbide grinding wheel.