The invention relates to the technical field of agriculture culture, and concretely relates to a heat-eliminating and summer heat-relieving agent for rabbit as well as a preparation method thereof. The heat-eliminating and summer heat-relieving agent comprises the following raw materials in parts by weight: 3-40 parts of VC-2 poly acid ester, 20-25 parts of multidimensional element, 2-5 parts of mint, 4-9 parts of verbena, 4-7 parts of goosegrass herb, 5-9 parts of plantago, 2-10 parts of cordate houttuynia, 2-6 parts of herba hedyotideae, 2-5 parts of herba siegesbeckiae, 2-5 parts of stenoloma chusana, 3-7 parts of Mussaenda pubescens, and 2-4 parts of Shi Jiting. By adding the Chinese herbal medicines, a heat radiation mechanism in body of the rabbits can be effectively regulated, detoxifcation and toxin discharge can be rapidly realized, chronic consumption-type diseases such as bird high fever and distemper are subjected to adjuvant therapy, and diseases of inflammation and drug poisoning can be treated, the heat-eliminating and summer heat-relieving agent can be repeatedly used in four seasons, and has protruding advantage by comparing with the prior art.