Microbial bacterial liquid is used to strengthen the capture and collection of paint spray mist. The microorganisms in the bacterial liquid simultaneously and efficiently complete the metabolism of refractory organic compounds in the spray spray mist. The products are carbon dioxide, water and inorganic substances. Slag removal equipment is regularly used to separate out the inorganic substances, turning hazardous solid waste into general solid waste. The bacterial liquid after slag removal can be continuously recycled for a long time after maintenance, achieving no wastewater discharge. The metabolic rate of organic matter is>99.5%; the bacterial liquid is recycled without wastewater; the operation is simple and the environment is widely adaptable. The technical application conditions are: pH:6-9; temperature: 5-40℃; microbial content: greater than 20 million/ml. Paint spraying hazardous wastewater and hazardous solid waste are reduced by 100%; paint spraying hazardous solid waste is converted to general solid waste, and the total solid waste is reduced by>60%; tons of paint spraying hazardous waste treatment achieve energy saving by>30%; tons of paint spraying hazardous waste treatment Achieve carbon emission reduction>100 kg.