The present invention relates to a quantitative analysis method for triterpene of Antrodia Camphoata, which comprises the following steps: (1) obtaining a fingerprinting chromatography (2) integrating an area of an absorption peak in a designate interval of the fingerprinting chromatography (3) calculating an area ratio between the absorption peak and an external standard and (4) calculating an content of the triterpene on the basis of the external standard.本發明係有關於一種定量牛樟芝三萜類成分的方法,本法包含以下步驟:(1)利用層析法取得牛樟芝指紋圖譜(2)積分指定區間的吸收峰面積(3)計算與外標準品之面積比值(4)以外部標準品計算三萜類含量。