The invention discloses an agent for treating peach anthracnose. The agent comprises 30-40% of famoxadone and 60-70% of a traditional Chinese medicine water decoction, wherein the traditional Chinese medicine water decoction comprises the following raw materials: 6-10 parts of typhonium giganteum, 5.5-7.0 parts of amoorcorn tree bark, 4.5-5.5 parts of radix sophorae flavescentis, 2.4-2.8 parts of rhizoma smilacis glabrae, 8-12 parts of garlic powder and 7.5-8.0 parts of radix stemonae. The agent provided by the invention is a pure biological agent, and has no medicine residue on peaches; the appearance of the anthracnose is effectively controlled by a traditional Chinese medicine insecticide of the amoorcorn tree bark, the radix sophorae flavescentis, the radix stemonae and the like; the stable yield and yield increase of the peaches are guaranteed; the agent has good economic and social benefits.