The invention discloses an instant tea of eucommia male flower and a preparation method thereof, which uses eucommia male flower, eucommia leaf, hawthorn and puerarin as raw materials; the preparation method comprises the nine processing steps of cleaning and choosing, leaching, thermal treating, heat dissipating, extraction, filtrating, concentrating, granulating and bagging, etc. In the eucommia male flower instant tea of the invention, the eucommia male flower, the eucommia leaf, the hawthorn and the puerarin of the raw materials have the functions of lowering blood pressure, reducing blood, preventing cerebral thrombosis and myocardial infarction, preventing senile dementia, being antitumor and anti-aging, enhancing immunity, etc., with consistent efficacy direction, due to the efficacy combination of the four raw materials, the invention has compound synergism effect; besides, the promoting digestion and removing stagnated food, reinforcing spleen and strengthening stomach functions of hawthorn and improving cardiac function of puerarin and nourishing liver and kidney function of eucommia male flower and eucommia leaf can achieve complementary effect, which leads the health function of the tea to be more distinctive. Due to containing richly calcium, phosphorus, magnesium, potassium, etc., the invention is endowed with rich nutrition, faint scent and good taste.