Based on the development concept of simplifying complexity, simplicity and health, six kinds of special tea are selected and refined by independent innovative technologies such as pure water low-temperature extraction and membrane concentration. The active substances in tea and its rich tea polyphenols, theanine and tea polysaccharides are retained to the greatest extent. As a natural extract, combined with the characteristics of convenient use, high standardization, long shelf life and stable flavor and taste, it is more suitable for milk tea shops and catering stores than tea raw materials.