The invention provides a method for preparing a tea drink, and particularly relates to a method for preparing a black tea drink. The method is characterized in that: the method adopts the drink preparing steps of preparation of original tea, washing of original tea, taste burning, baking, warm soaking, low-fire cooking, steaming, cooling, stirring, filtering, temperature adjusting, filtering, degassing, sterilization, re-cooling, refiltering, heating and canning, quality inspection and the like; by the method, the original healthcare functions of degreasing, reducing fat, aiding digestion and benefiting intestines and stomach of the black tea are maintained, and no chemical additive is added; moreover, the black tea drink prepared by the method is red-yellow, has concentrated fragrance and tastes fresh and good, and the method provides a black tea original juice drink conveniently drunk by people.