The invention discloses a selenium-enriched trace element beverage and a preparation method thereof. The trace element beverage includes liquid tea beverage, coffee beverage, fruit juice beverage, soybean milk beverage, beer and drinking water added with selenium, and also includes solid tea products, Coffee products, fruit juice products, bean products, dairy products and other granulated beverages can maintain the original flavor and taste of the beverage, and at the same time have the unique anti-cancer and detoxification, anti-oxidation, anti-aging, prevention and treatment of Keshan disease, high blood pressure, Coronary heart disease, diabetes, enhance immunity, improve sperm motility, enhance liver activity, maintain heart function, remove heavy metal toxicity, accelerate detoxification and other health effects of trace element drinks. The beverage is not only suitable for daily selenium supplementation of normal people, but also suitable for intensive selenium supplementation of selenium-deficient people.