从太白木（ＡｒａｌｉａｔａｉｂａｉｅｎｓｉｓＺ．Ｚ．ＷａｎｇｅｔＨ．Ｃ．Ｚｈｅｎｇ）根皮中首次分离得到四个三萜皂甙，根据理化性质和光谱数据，分别鉴定为齐墩果酸３Ｏ［βＤ吡喃木糖（１→２）］［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸甙（１），ｔａｒａｓａｐｏｎｉｎⅤ（２），３Ｏ｛［βＤ吡喃木糖（１→２）］［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸乙酯｝齐墩果酸２８ＯβＤ吡喃葡萄糖甙（３）和３Ｏ｛［βＤ吡喃木糖（１→２）］［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸丁酯｝齐墩果酸２８ＯβＤ吡喃葡萄糖甙（４）。１为新天然产物，３和４为新化合物，分别命名为太白木皂甙Ⅵ（ｔａｉｂａｉｅｎｏｓｉｄｅⅥ）、太白木皂甙Ⅶ（ｔａｉｂａｉｅｎｏｓｉｄｅⅦ）和太白木皂甙Ⅷ（ｔａｉｂａｉｅｎｏｓｉｄｅⅧ）。 Four triterpene saponins were isolated from the root bark of Aralia taibaiensis Z.Z. Wanget H.C. Zheng for the first time. According to the physicochemical properties and spectral data, they were identified as oleanolic acid  3  O  [β  D Glucopyranose (1→2)] β-D glucopyranose (1→3)] β-D glucuronide (1), tarasaponinV (2), 3O{ [β-D-xylopyrose (1→2)] β-D-glucopyranose (1→3)] β-D-glucuronoglucuronic acid}oligosan28 OβDglucopyranoside(3) and 3O{[D-xylopyrose (1→2)] βD-glucopyranose (1→3)]β -D-glucuronopyranoate}- oleanolic acid -28-O-β-D-glucopyranoside (4). 1 is a new natural product, and 3 and 4 are new compounds named as taibaienoside VI, taibaienoside VII, and taibaienoside VIII, respectively.