The invention belongs to the technical field of diamond grinding wheel manufacturing, and in particular, relates to a manufacturing method of a diamond grinding wheel. A grinding wheel substrate is provided; the surface of the grinding wheel substrate is roughened, and is coated with an insulation layer; a rotating device comprising a rotating end is provided; the grinding wheel substrate is fixedon the rotating end; an electrostatic generation device is provided, and is connected with the grinding wheel substrate; diamond abrasives and binder powder are provided, and are uniformly mixed to obtain a mixture; the mixture is positioned around the grinding wheel substrate; the rotating device is started to control the rotating end to rotate to drive the grinding wheel substrate to rotate; the grinding wheel substrate absorbs the mixture during rotating; and the grinding wheel substrate is taken out for sintering to form the diamond grinding wheel. The manufacturing method has no need touse a model for shaping in the manufacturing process, and is simpler, high in production efficiency, lower in use level of the mixture, lower in deformation after sintering, free of finish polishing and better in quality.