The invention discloses a medicinal composite preparation containing quinolones, a preparation method thereof and an application thereof. The medicinal composite preparation containing quinolones comprises the following components, by mass, 0.5-95% of a quinolone medicine or a salt compound thereof, 1-97% of an organic acid or a salt compound thereof, 1-98.5% of a sweetener, 0-45% of a flavor enhancer, 0-10% of a flavoring agent, and the balance excipient. Finished products prepared from the medicinal composite preparation containing quinolones, which have the characteristics of stability, excellent dispersibility, good palatability and easy absorption, can be used as a broad-spectrum antiseptic, have the advantages of strong bactericidal activity, wide in vivo distribution and no cross drug resistance with other antibiotic medicines, and are effective to bacteria and mycoplasmas, can be used to treat various infectious diseases of the alimentary system, the respiratory system, the urinary system or the skin soft tissue of animals, wherein the diseases are caused by the sensitive bacterial or the mycoplasmas.