The invention discloses a preparation method of common zinnia and common snapdragon tea powder. The common zinnia and common snapdragon tea powder is prepared by taking leaves of common zinnia and common snapdragon as the main raw materials through the steps of raw material preparing, ground tea preparing, composite enzyme treating, blending, homogenizing, degassing, sterilizing, vacuum concentrating, freeze drying, arranging and packing and the like. According to the preparation method of the common zinnia and common snapdragon tea powder, leaves of common zinnia and common snapdragon are subjected to steam fixation, bitterness and astringency of the raw materials are removed, the raw materials are subjected to beating with a vitamin C solution, and nutrient substances are better enriched; by means of composite enzyme treating, the nutrient substances in leaves of common zinnia and common snapdragon are fully reserved, and the use ratio of the raw materials is increased; by means of multiple times of homogenizing, not only is the mouthfeel of the finished tea powder product improved, but also the quality of the finished tea powder product is promoted, and the finished tea powder product has the health-care effects of clearing heat, removing toxicity, cooling the blood, removing swelling, removing damp, benefiting qi and the like.