The spray painting wastewater treatment technology was explored and analyzed,and some relevant suggestions for the spray painting circulating water treatment process of the water curtain spray booth were put forward.At the same time,the process technology of treating paint mist by combining the screw pressure filter with the air flotation tank was shared.The technology not only reduced the labor intensity of manually picking up paint residue,but also reduced the cost of hazardous waste treatment and saved the operating cost of the enterprise.