The present situation of automobile painting industry and the requirements of laws and regulations are introduced, and the problems existing in 3 C2 B painting are pointed out. Meanwhile, the environmentallyfriendly process of high solid content color paint + 2 K varnish for automobile painting are developed, and the VOC content, appearance and properties of 1 K varnish, high-solid varnish and 2 K varnish are compared,respectively. The results show that the properties of 2 K varnish with high solid content color paint meet the requirements of the enterprise.