The invention discloses application of a medicine composition for treating cold to preparing antibacterial medicine. The medicine composition is prepared from, by weight, 1-9 parts of ephedra, 1-9 parts of mint, 1-9 parts of periostracum cicada, 1-20 parts of honeysuckle, 2-20 parts of radix scutellariae, 2-18 parts of apricot kernels, 1-9 parts of fritillary bulb, 1-9 parts of platycodon grandiflorum and 1-9 parts of liquorice. Conventional auxiliary materials are added into the raw materials, and the mixture is prepared into clinically accepted tablets, granules, pills, capsules, drop pills, soft capsules, sustained-releasing drugs, oral liquid preparations or freeze-dried powder injections according to the conventional technology. New application is developed, and new medicine is provided for treatment of bacteria infected by staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, shigella flexneri and proteus.