It is suggested that the formaldehyde volatilization room should reach 3- 15 after decoration and ventilation for at least three months, and it can be cleaned up. In addition to formaldehyde's general formula: Ventilation in in addition to formaldehyde is harmful to indoor air circulation, reducing the content of harmful substances in indoor air and reducing the harm of substances in winter. Close the doors and windows, indoor and outdoor air can circulate, only the formaldehyde content in indoor air increases, and radon gas escapes, even reaching a high concentration. 2. Sexual carbon adsorption is harmful to formaldehyde. Carbon masks are recognized as addicts. The physical function of sex carbon is to deodorize and detoxify. Removal of plant odor, elimination of formaldehyde hazards, low pollution options, plant pollution: general indoor environmental pollution, light pollution, pollution value three times the household standard, plant purification can be more effective. According to the same function and area of the room, plant conditions are selected. /kloc-It is more suitable to put two pots of plants in a room of about 0/0 square meter, just like I put chlorophytum, Phragmites australis and aloe vera indoors to absorb harmful substances.