The invention belongs to the field of medicines, and relates to a medical composition for preventing and treating NITM and a pharmaceutical application of the medical composition. Specifically, the medical composition is a medical composition for eyes, such as a preparation for eyes. Specifically, the medical composition disclosed by the invention comprises 0.001%-0.2% of atropine or pharmaceutical salt thereof, and one or more auxiliary materials acceptable in pharmacy, wherein the pH value of the medical composition is 4.0-6.5, the medical composition comprises 0.5%-5% of a pH regulation agent, and the pH regulation agent is selected from any one or more of sodium dihydrogen phosphate, disodium hydrogen phosphate, citric acid, citrate, boric acid and borate. The medical composition disclosed by the invention can effectively treat and / or prevent NITM, and has favorable application prospects.