The invention relates to composition for preventing or treating diseases caused by exogenous wind heat, and the composition is prepared from raw materials of folium mori, chrysanthemum, almond, prunella vulgaris, mint, platycodon grandiflorum, liquorice and reed rhizome. Eight traditional Chinese medicine raw materials in the composition generate a synergistic effect due to scientific compatibility; various medicines are combined for use and learn from each other; the composition has effect of removing wet potential, resolving sore toxin, dispelling wind, clearing away heat, diffusing the lung and suppressing coughing; all the traditional Chinese medicine raw materials take effects of clearing away heat, removing toxicity, relieving sore throat and suppressing coughing together; and the composition treats both symptoms and root causes. By clinical verifications, the composition can effectively reinforce immunocompetence of organisms, can effectively prevent and treat wind-heat cold, hot eye headache, hypertension, cough and furuncle pyogenic infections, relieves sore throat, prevents sunstroke and resists to urinary system infection. The composition disclosed by the invention has wide drug treatment disease spectrum, strong pertinence and obvious treatment effect; and moreover, the eight medicinal materials are all homologous medicinal materials, have mild performance, can be taken for a long time, can be prepared into herbal tea and healthy beverages or be made into various medicine preparations and have a wide taking range.