Life cycle assessment can be used to evaluate the environmental issues involved in the entire product production process (including raw material acquisition, production, transportation, use/maintenance and final disposal). It is an important support tool for screening and developing an efficient, low-cost and environmentally friendly product. In this study, based on the life cycle method, an environmental impact assessment of the resource consumption and pollutant emission data was carried out for the mesoporous K-Ag/Co 3 O 4 catalyst life cycle. The results show that the proportion of resource consumption to produce 1 kg of mesoporous K-Ag/Co 3 O 4 is 0.132. Environmental impact types mainly contain fossil depletion, climate change, human health and particulate matter formation; The substances produced by mesoporous K-Ag/Co 3 O 4 catalyst life cycle have the greatest impact on human health, including carcinogens, resp. inorganics and human toxicity. These substances are mainly gas pollutants, CO 2 emission is the largest, followed by SO 2 and CH 4 . Whether it is health impact, environmental impact or resource depletion, electricity consumption is the main factor. Thus, it is necessary to improve the production process and use low-power equipment to reduce the environmental impact of the entire life cycle. The use of mesoporous K-Ag/Co 3 O 4 catalyst has purified a large amount of formaldehyde and has a good environmental effect.