根含總生物堿約0.93%,其中苦參堿(matrine)0.52%,氧化苦參堿(oxyma-trine)0.35%,以及微量的臭豆堿(anagyrine)和甲基金雀花堿(methylcytisne);并含槐果堿(sophocarpine)。黃酮類化合物有紫檀素(pterocarpin)和l-三葉豆高麗槐甙(l-trifolirhizin,l-maackioin-β-D-glucoside),后者經(jīng)酶水解得l-高麗槐素(l-maackiain),均為紫檀素類化合物,有抗癌作用,其作用甙比甙元強,右旋體比左旋體強。另含山豆根素(sophoranone)、山豆根查耳酮(sophoradin)、山豆根色烯素(sophoranochromene)、山豆根色烯查耳酮(sophoradochromene)、山豆根色烯素(sophoranochromene)、山豆根色烯查耳酮(sophoradochromene)、山豆根色滿素(2-[{3′-hydroxy-2′,2′-dimethyl-8′-(3-methy-2-butenyl)}chroman-6′-yl]-7-hydroxy-8-(3-methyl-2-butenyl)chroman-4-one)、山豆根苯并二氫呋喃素(2-[{2′-(l-hydroxy-l-methylethyl)-7′-(3-methyl-2-butenyl)-2′,3′-dihydrobenzofuran}-5′-yl]-7-hydroxy-8-(3-methyl-2-butenyl)chroman-4-one)、大豆素(daiazein)、山豆根苯并吡喃素(2-[(7′-hydroxy-2′-dimethyl-2H-benzopyran)-6′-yl]-7-hydroxy-8-(3-methyl-2-butenyl)chroman-4-one)、4′,7-二羥基-6,8-雙(3-甲基-2-丁烯)二氫黃酮(4′,7-trihydroxy-6,8-bis-(3-methyl-2-butenyl)flavanone)、2′,4′,7-三羥基-6,8-雙(3-甲基-2-丁烯)二氫黃酮(2′,4′,7-trihydroxy-6,8-bis-(3-methyl-2-butenyl)flavanone)、山豆根新色烯查耳酮(6-[3-(2′,4′-dihydroxyphenyl)acryloyl]-7-hydroxy-2,2-dimethyl-8-(3-methyl-2-butenyl)2H-benzopyrane)、山豆根新色烯素(2-(2′,4′-dihydroxyphenyl)-8,8-dimethyl-10-(3-methyl-2-butenyl)-8H-pyreano[2,3-d]chroman-4-one)及柒料木素;其所含酚性物質(zhì),水解得咖啡酸和長鏈醇(CnH2n+1OH,n=20,21,23,24,25,26)其中以C26為主,占72.4%;此外,尚含羽扇豆醇、β-谷甾醇、維生素C和維生素B1。有報道,中性多糖由D-半乳糖和D-葡萄糖組成,其分子比為1:1。