Preparation method of white tea

The invention belongs to the technical field of processing of tea leaves, and particularly discloses a preparation method of white tea. The preparation method of white tea disclosed by the invention comprises the following steps of (1) performing cyclical withering and micro fermentation treatment: performing withering on picked fresh tea leaves under the illumination of first green light, performing micro fermentation, then performing soft pressing and rolling, performing withering on rolled tea leaves under the assistance of second green light, performing micro fermentation once again, and performing withering on the tea leaves after micro fermentation for the second time under the illumination of blue light; (2) performing steam treatment: treating the withered tea leaves through steam,and then performing spreading for cooling; (3) performing strip tidying; and (4) performing drying: performing baking treatment for the second time on the tea leaves. Compared with a traditional white tea preparation method,