The invention discloses a moxifloxacin gelatin capsule, whose contents comprises moxifloxacin or its salts and/or its hydrate and additive, the additive is at least one selected from the following substances: sodium sulfite, sodium acid sulfite, low-molecular proanthocyanidin, L-glutathion, sesame polyphenols, green tea polyphenols, tocopherol, ascorbic acid, isoascorbic acid, vitamin B1, vitamin B2, beta-carotene, soybean isoflavones, L-sulfo-aminolactic acid, pyrophosphoric acid, polyphosphoric acid and their medicinal salts.