The invention relates to a milk-flavor coarse cereal broad bean for diminishing inflammation and clearing heat and a preparation method thereof. The milk-flavor coarse cereal broad bean is characterized by being prepared from the following raw materials, by weight, 200-230 parts of broad bean, 10-13 parts of snake gall, 8-10 parts of snake slough, 20-25 parts of aloe, 3-5 parts of shredded ginger, 15-17 parts of salt, 30-35 parts of castor bean, 50-55 parts of goat milk, 15-20 parts of yellow rice wine, 15-20 parts of preserved red date, 30-35 parts of coarse cereal flour, 30-35 parts of peanut kernel, 13-15 parts of dried apple, 5-7 parts of loofah sponge, 20-25 parts of a nutritional additive solution and a proper amount of water. The milk-flavor coarse cereal broad bean for diminishing inflammation and clearing heat has unique flavor, attractive color and lustre and exquisite appearance, and traditional Chinese medicines contained in the broad bean and active ingredients have health-care effects of clearing summer heat, enhancing immunity of human body, sterilizing and diminishing inflammation, invigorating stomach and reducing phlegm, etc.