Preparation method of high-content tanshinol extract

The invention discloses a preparation method of high-content tanshinol extract. The method concretely comprises the following steps: 1, crushing radix salviae miltiorrhizae medicine, and carrying outreflux extraction on the crushed radix salviae miltiorrhizae medicine with alkaline water to obtain an extracting solution; 2, absorbing the extracting solution with macroporous resin, then analyzingto obtain an analytical solution, and removing ethanol in the analytical solution to obtain a concentrated solution; 3, adjusting the pH of the concentrated solution, then adding HL-2 enzyme into theconcentrated solution, and standing; 4, adjusting the pH of the standing solution, and extracting with a mixed solvent to obtain extracted supernatant; 5, concentrating and drying the extracted supernatant to obtain a tanshinol extract finished product. The preparation method integrates the extraction and purification of the tanshinol, so that the high-content tanshinol extract can be obtained bymeans of one-time processing