The invention belongs to the technical field of veterinary drug preparations, and discloses a compound spray film agent for cows, which is made of the following components in parts by weight: 1-5 parts of povidone-iodine, 0.1-2 parts of clove oil, two 2-8 parts of methyl sulfone, 3-10 parts of film-forming agent, 0.5-2 parts of thickener, 0.5-2 parts of humectant, 0.5-2.5 parts of transdermal absorption accelerator, 70-90 parts of solvent; the solvent It is a mixture of alcoholic solvents and aqueous solvents. The compound spray film agent of the present invention uses povidone iodine, clove oil, borneol / menthol, and dimethyl sulfone as the composite components of the principal agent, and dimethyl sulfone is applied to the film spray agent for cow mastitis for the first time to improve poly Povidone iodine and clove essential oil’s antibacterial and disinfection ability can promote the healing of dairy cow udder wounds, and solve the problem that traditional spraying agents only use povidone iodine single preparation and can only prevent dairy cow mastitis but cannot treat it; compared with other dairy cow mastitis The preparation for external use is evenly coated, the film-forming speed is fast, there is no sagging or dripping phenomenon, the effect of promoting wound healing is obvious, and the healing rate is high.