The invention discloses an internal heat reducing broadleaf holly leaf and a preparation method thereof. The internal heat reducing broadleaf holly leaf comprises raw materials including, by weight, 100-110 parts of broadleaf holly leaves, 40-50 parts of florists chrysanthemum, 30-40 parts of honeysuckle, 20-30 parts of hawthorn, 20-30 parts of gardenia, 30-40 parts of granulated sugar, 7-8 parts of frozen pigskin, 2-3 parts of fish sauce, 2-3 parts of apple vinegar, 4-5 parts of fried bread stick powder, 5-6 parts of bean sprout freeze-dried powder, 3-4 parts of pumpkin seed oil, 4-6 parts of oyster mushroom, 6-7 parts of longan aril, 5-6 parts of pumpkin heads, 3-4 parts of greenish lily flowers, 4-5 parts of linden honey, 0.5-1 part of gynostemma pentaphylla, 0.5-1 part of dangshen, 1-2 parts of broad been skin, 1-2 parts of boxthorn leaf leaves, 1-2 parts of sealwort, an appropriate amount of water and 40-50 parts of nutritional auxiliaries. The broadleaf holly leaves, the florists chrysanthemum and the honeysuckle serve as main materials, the internal heat reducing broadleaf holly leaf has the effects of losing weight, dispelling wind, dissipating heat, nourishing the liver to improve visual acuity, resolving toxin with clearing coolness and calming mind, and added traditional Chinese medicines have the functions of protecting liver, resolving toxin and lowering blood pressure, blood lipid and blood sugar.