The painting process of automobile manufacturing is complicated.According to different processes,each process in the production process will produce painting waste water with complex pollution components and high pollutant concentration.The waste water is discharged intermittently and irregularly.It is necessary to reasonably select the appropriate waste water treatment method and design the treatment process according to the process characteristics of different enterprises according to local conditions.It can improve the efficiency of waste water treatment,shorten the treatment cycle and reduce the treatment cost.Taking the coating waste water treatment of an automobile manufacturing enterprise as an example,this paper analyzes the application of waste water treatment process in engineering practice,so as to explain how to select comprehensive treatment method and combined treatment process in the face of multiple coating waste water treatment at the same time,so as to provide reference for peers.