The invention discloses a methanal purifying agent based on traditional Chinese medicine components. The purifying agent is prepared from the following raw materials in parts by weight: 6-8 parts of magnets, 6-10 parts of purslane extracting solution, 3-6 parts of kieselguhr, 1-5 parts of activated carbon, 4-6 parts of bentonite, 10-15 parts of fructus amomi, 9-14 parts of cortex fraxini, 7-10 parts of cyrtomium rhizomes, 9-16 parts of Chinese ilex leaves, 6-8 parts of Chinese redbud flowers, 2-4 parts of maifan stones, 1-5 parts of titanium dioxide, 10-13 parts of ocimum basilicum, 14-22 parts of epipremnum aureum flowers, 5-11 parts of tuberose, 8-10 parts of litsea cubeba, and 9-12 parts of honeysuckle. The methanal purifying agent disclosed by the invention has the benefits that the methanal purifying agent based on the traditional Chinese medicine components disclosed by the invention can effectively remove methanal, and at the same time secondary pollution to the environment is avoided, so that the physical health of people is ensured.