The invention belongs to the field of high polymer materials, and discloses a flame-retardant insect-proof antibacterial mat for a floor carpet.The flame-retardant insect-proof antibacterial mat is prepared from low-density polyethylene, high-density polyethylene, decabromodiphenyl ether, polyethylene resin, zinc stearate, antimonous oxide, polyethylene wax, medical stone, natamycin, beta-cyclodextrin, chitosan, silane coupling agent, traditional Chinese medicine additives, citric acid, foaming agent, monoglyceride and color master batch.The product is a green and pollution-free product and has high flame retardance and good insect-proof and antibacterial performance, can restrain breeding of viruses, insects, mites, ants and the like for a long time, can effectively protect the floor carpet, and is harmless to human bodies and free of hidden health and safety dangers in the use process.