对沉淀法制取茶皂素的工艺进行了优化。结果表明沉淀反应的最佳工艺条件为：反应温度为室温、沉淀剂加入量为茶粕原料的16%、反应时间3 h；皂素释放液采用真空抽滤分离，滤饼用热水洗涤1次，释放反应最佳条件为：选用碳酸氢铵作皂素释放剂、反应温度70 ℃、按化学平衡反应率为50%添加碳酸氢铵量、反应时间为2.5 h。该方法可减少茶皂素浓缩能耗，降低生产成本。

Theasaponin was prepared by sedimentation in this paper. The result showed that the best deposit conditions were as follows: room temperature, 3 h and 16% of CaO. Decompounding solution was filtrated under vacuum and the filter cake was washed with hot water. For decompounding the theasaponin, the best reagent, reaction temperature and time were NH4HCO3, 70 ℃, and 2.5 h, respectively. This method could reduce energy consumption as well as the production cost.