Life cycle assessment can evaluate the environmental issues involved in the whole process of the product production, and is an important support tool for screening and developing efficient,low cost and environmentally product. In this study, based on the life cycle method,the environmental impact assessment of the resource consumption and pollutant emission data were carried out for mesoporous MnO_2 life cycle. The results showed that the resource of producing mesoporous MnO_2 of 1 t, was 68.44 times of the proportion of resource consumption; environmental impact types mainly contained fossil depletion, climate change,acidification,human health and particulate matter formation; 95% of the pollutants produced by mesoporous MnO_2 life cycle were originated from electricity consumption. Thus,it is necessary to properly improve the production process, use low-power equipment in order to reduce the environmental impact of entire life cycle.