The invention discloses a summer-heat-clearing herbal tea and a preparation method thereof. The summer-heat-clearing herbal tea comprises the following raw materials by weight: 60 to 70 parts of green tea, 15 to 20 parts of balsam pear leaf, 10 to 15 parts of pumpkin pulp, 5 to 7 parts of mint, 5 to 8 parts of honeysuckle flower, 3 to 5 parts of plantain herb, 1 to 2 parts of lophatherum herb, 3 to 5 parts of villous amomum fruit, 2 to 4 parts of bitter orange, 1 to 2 parts of shortleaf kyllinga herb, 1 to 2 parts of Paliurus ramosissimus, 2 to 4 parts of Chinese hawthorn seed powder, 1 to 2 parts of walnut powder, 3 to 5 parts of apple powder, 5 to 7 parts of wheat germ powder and 2 to 4 parts of spirulina powder. According to the invention, a plurality of medicinal and edible raw materials are carefully chosen, the summer-heat-clearing herbal tea are scientifically prepared from the raw materials, so the herbal tea is capable of clearing away heat and toxic materials, clearing the liver, improving eyesight, expelling dampness, tonifying the body, promoting the production of body fluid to quench thirst, clearing heat, relieving cough, purging fire, eliminating vexation, invigorating energy and tranquillizing the mind and is applicable to people who feel fatigued during working, get sunstrokes and suffer from dysphoria with smothery sensation.