Extraction method of tea saponin applied to cosmetics

The invention belongs to a preparation method of plant extraction, and particularly relates to an extraction method of tea saponin applied to cosmetics. The method comprises the following steps: 1) raw material crushing: crushing raw materials into granular tea meal; 2) pretreatment: carrying out dipping extraction on the tea meal by using ethyl acetate to remove the grease in the tea meal; 3) drying: drying the pretreated tea meal to remove the redundant ethyl acetate; and 4) leaching and impurity removal: preparing a mixed solution from ethanol and ethyl acetate, leaching the dried tea meal,adding an adsorbent into the primary extracting solution obtained after leaching, adsorbing, and filtering to obtain a leaching solution. The tea saponin extracted by the method disclosed by the invention has high saponin content, can effectively control microorganisms and heavy metal elements, and has wide application in the field of cosmetics; and the whole method has the advantages of being simple, low in cost, almost