In the process of lightweight transformation in the automotive industry,aluminum is more and more used in white body because of its outstanding comprehensive advantages of light weight and high strength.The compatibility between aluminum and coating pretreatment process has gradually become a common topic faced by many old production lines.The problems needing attention and solutions when matching aluminum white body with the traditional phosphating process production line,as well as the new technology and development status of collinear pretreatment of various plates in the industry were introduced.