During the new crown pneumonia epidemic, we should stay at home and reduce the number of times we go out, so to improve indoor air quality, the following measures can be taken: 1, do not smoke indoors, open the hood or exhaust fan when cooking; 2, proper ventilation every day to maintain indoor air circulation, so that indoor air and outdoor air exchange, but do not open the windows when the haze is severe, in order to reduce the haze of dust particles into the room; 3, you can use air purifiers to effectively remove harmful gases and pathogenic microorganisms in the air; 4, planting green plants indoors, such as aloe vera, hanging orchids, tiger tail orchids, etc., not only to beautify the living environment, but also to purify the air.