Method for extracting active substances from Chinese traditional compound medicine

The invention relates to a method for extracting active substances from Chinese traditional compound medicine. The method comprises the following steps: (1), the Chinese traditional compound medicine is dried and crushed with grain size of 0.15 mm-0.45 mm; (2), the crushed compound medicine powder is put in a vessel and processed for 1-10 min with 100 percent of microwave or in a combine manner of microwave and light wave; and (3), the processed compound medicine powder is put in a supercritical extraction apparatus for a double-separation vessel, wherein supercritical CO2 fluid is taken as the extracting agent, the extracting pressure is ranged from 28 MPa to 35 MPa, and the extracting temperature is ranged from 35 DEG C to 60 DEG C. The invention increases the dissolution rate of the active substances in the follow-up supercritical process, enlarges the application range of the CO2 supercritical extraction through combining the microwave/light wave dry preprocessing with the CO2 supercritical extraction, ha