On the purification project daily disinfectant disinfection solution every day after the end of production, with 75% ethanol or 2 ‰ Xinjieermei solution to wipe the machine, desktop, doors, windows, walls, etc., with 3% to 5% of the Lysol on the ground to wipe disinfection. Every three days after the end of production, with 75% ethanol or 2 ‰ new cleaner extermination solution on the clean room all the facilities surface and ceiling, lighting and other surfaces to wipe disinfection, 3% to 5% of the Lysol on the ground disinfection. The purpose of the purification project is to kill the bacterial propagules produced due to the production process and control the indoor microbial content. These measures can only control the amount of bacteria and stray bacteria species in the air of the purification project. If there are more molds, it is necessary to spray the indoor with 5% carbolic acid comprehensively, and then fumigate with formaldehyde in order to achieve aseptic effect, and only in this way can we kill the bacteria and stray bacteria spores. The end of each production cycle, the next cycle of production before the aseptic requirements of the clean room disinfectant disinfectant solution, test the clean room dust particle count in line with the provisions of the clean room, and then fumigate the clean room with formaldehyde gas, from the results of the long-term testing, clean engineering using this environmental sterilization method has a good effect. Clean room is divided into non-biological clean room and biological clean room, biological clean room air purification system must be kept in continuous operation, non-biological clean room air purification system can be opened a few hours in advance. Measurement of indoor dust particles with a dust counter, the indoor environmental hygiene cleaning and cleaning after waiting for 1 hour to prevent human factors produce pollution. Dongguan Chouda Industry focuses on fine decorative works. For the control of microbial content, control of microorganisms in the clean room mainly rely on the air purification equipment system, which can reach 99% filtration performance, effective removal of dust and bacteria.