This paper introduces four effective ways to improve the quality of mechanical equipment products: optimizing product design, optimizing product manufacturing process, strengthening product inspection and supervision, and improving product painting and packaging. By selecting the appropriate roller table of the roller mill, selecting the appropriate rotor structure of the powder concentrator, and paying attention to the interference fit effect between the roller shaft and the roller sleeve of the roller press, the equipment performance indicators are optimized. Through the use of robot welding work station, the performance of processing equipment is improved by using numerical control drilling machine tools. The controllability of the product manufacturing process is improved by preparing the product quality inspection plan (QCP), specifying the special terms of the technical text of the contract, controlling the equipment inspection time node, grasping the supervision method, etc. Product appearance and packaging quality is achieved by improving coating materials, coating methods and product packaging.