The present invention discloses a composite goose feed for summer, and a preparation method thereof. Raw materials of the composite goose feed comprise: wheat bran, soybean meal, rice bran, grape seed oil, lysine, methionine, fish meal, calcium hydrogen phosphate, gravy salt, a premix, heartleaf houttuynia herb, wintergreen oil, figwort, cultivated purple perilla leaf, angelica archang lica, Chinese thorowax root, obtuseleaf senna seed, greenish lily bulb, honeysuckle, mulberry leaf and lotus seeds. According to the present invention, formula cost is low, the components are easily obtained, the preparation method is simple, the feed is added with the traditional Chinese medicines such as heartleaf houttuynia herb, wintergreen oil, figwort, cultivated purple perilla leaf, angelica archang lica, Chinese thorowax root, obtuseleaf senna seed, greenish lily bulb, honeysuckle, mulberry leaf and lotus seeds so as to effectively regulate a body temperature of the goose and prevent goose heatstroke, a fattening effect is significant, a prevalence rate is low, and disadvantages due to various nutrition deficiencies are effectively overcome.