The invention discloses a plant composition for an air purifying agent. The plant composition is characterized by consisting of aloe, bracket-plant, sansevieria, orchis cyclochila, monstera deliciosa, hedera helix, cycas, chrysanthemum, kumquat, pomegranate, sun plant, China rose, camellia, aglaia odorata, daisy, calyx canthus, marigold, orchid, sweet osmanthus, caladium bicolor, excoecaria cochinchinensis, lichen, seaweed, rose, violet, jasmine, lemon, rosebush, crape myrtle, carnation, lily of the valley, cactus, sansevieria trifasciata, agave, opuntia basilaris, laciniate kalanchoe herb, stonecrop, bryophyllum and cultivated pineapple. The product can imitate the principle of natural forest plant purification, quickly decompose various toxic and harmful gases indoors through strong chelate reaction and high-order complexing action, can kill colon bacillus, pseudomonas aeruginosa, staphylococcus aureus and the like with sterilizing rate reaching 99.7 percent, can effectively decompose various toxic and harmful gases, and remove off flavor.