The invention belongs to the technical field of livestock and poultry feeding and specifically relates to a medicament for treating dermatomycosis of young rabbits. A pharmaceutical composition for treating dermatomycosis of young rabbits is prepared from the following components in percentage by weight: 10% of neomycin, 10% of gentamicin, 10-20% of sulfur powder, 10% of clotrimazole, 40-50% of talcum powder, 5% of terbinafine hydrochloride and 5% of ketoconazole. The pharmaceutical composition is proven practically to have an excellent effect on the prevention and treatment of the dermatomycosis of young rabbits, and is simple in preparation method and convenient to use; if the compound medicament is used in the growth process of young rabbits, the dermatomycosis of young rabbits can be thoroughly prevented and a remarkable effect can be achieved.