The invention discloses a preparation method of Boschniakia rossica health tea. The method comprises the following steps: selecting Boschniakia rossica, removing impurities, cleaning the Boschniakia rossica, boiling the Boschniakia rossica with purified water, extracting, filtering, combining filtrates, storing filter residue for later use, subjecting the filtrate to precipitation with ethyl alcohol, and recovering the ethyl alcohol, so as to obtain an extracting solution a; performing reflux extraction on the filter residue with ethyl alcohol, recovering the ethyl alcohol, so as to obtain an extracting solution b, boiling hawthorn and Chinese date with purified water, extracting and filtering, so as to obtain an extracting solution c, combining the extracting solution a, the extracting solution b and the extracting solution c, concentrating under reduced pressure the combined extracting solution, so as to obtain an extract, freeze-drying the extract, so as to obtain powder semi-finished products, adding citric acid, stevioside and honey into the semi-finished products, and rapidly mixing and drying, so as to obtain finished products. The Boschniakia rossica health tea prepared through the method has good health efficacies of fatigue resistance, anoxia resistance, nourishing, tonifying qi, spleen and kidney, improving the immunity of the organism and the like, is sour, sweet and tasty, does not have astringency of Boschniakia rossica, and is suitable for customers in all age groups.