Processing method of rhizoma polygonati tea

The invention relates to a processing method of rhizoma polygonati tea. The processing method comprises the steps of (1) rhizoma polygonati pretreatment, (2) high-density carbon dioxide treatment, (3) slicing and rapid drying, (4) first steaming and drying, (5) second steaming and drying, (6) third steaming and drying, (7) boiling and draining, and (8) composite drying and baking. High-density carbon dioxide is adopted to treat the rhizoma polygonati, various enzymes in the rhizoma polygonati can be rapidly inactivated, and meanwhile, the structure and nutrition of the rhizoma polygonati are hardly damaged. 一种黄精茶加工方法，包括：（1）黄精预处理、（2）高密度二氧化碳处理、（3）切片与快速干制、（4）第一次蒸制干燥、（5）第二次蒸制干燥、（6）第三次蒸制干燥、（7）煮制与沥干和（8）复合烘干焙香。本发明采用高密度二氧化碳处理黄精，可以对黄精内部的各种酶类快速灭活，同时对黄精的结构和营养几乎没有破坏。