Preparation method of camellia nitidissima extract

The invention discloses a preparation method of a golden camellia extract, which comprises the following steps: (1) taking golden camellia, removing impurities, drying, and crushing into fine powder; (2) taking the fine powder obtained in the step (1), adding 8-15 times of water, decocting for 2-3 times (1-2 hours each time), filtering, and combining filtrates; and (3) concentrating the filtrate obtained in the step (2), adding the concentrated filtrate to a macroporous resin column, standing for adsorption, sequentially eluting with purified water and an ethyl acetate-ethanol mixed solution, collecting the eluent of the ethyl acetate-ethanol mixed solution, and concentrating under reduced pressure until the eluent is dry, thereby obtaining the golden camellia extract. The camellia nitidissima total flavonoids prepared by the preparation method disclosed by the invention are high in yield, simple in process, low in cost and beneficial to industrial production. 本发明公开了一种金花茶提取物的制备方法，包括(1)取金花茶，进行除杂，干燥，粉碎成细粉；(2)取步