Abstract:The Main constituents of Radix Ginseng, Fructus Schisandrae and Radix Salviae Mihiorrhizae in Yixinfumai Granules were studied by TLC. It was found that ginsenosidegot hydrolyzed while the drugs were being boiled togerther. The main constituents of Fructus Schisandrae were schizandrol A and B; and those of Radix Salviae Miltiorrhizae were tanshinone and protocatechuic aldehyde.