The steel plate of 20 Meter Cubic Water Tank Truck absorbs the double-side sand blasting technology, which can get rid of the oxide coating, rust, the stress of steel materials, and some others. Additionally, the adhesive force of paint film is enhanced. Then, exceptional quality of both vehicle welding and paint spraying can be achieved. Thanks to the adoption of stoving varnish technique, the paint on surface of tank body can possess high brightness and nice appearance. The interior tank body is subjected to preservative treatment, thus providing corrosion resistance and long lifespan. Furthermore, this tank body takes advantage of CNC automatic welding and longitudinal seams, so the welding quality is reliable and the appearance is gorgeous.