Gingko leaf extract solvent proportional extraction method

The invention relates to a gingko leaf extract solvent proportional extraction method and belongs to the field of gingko extract processing, wherein the gingko leaf extract mainly refers to terpene lactones and bilobalides. The invention especially relates to the gingko leaf extract solvent proportional extraction method, which overcomes a defect that in the prior art, only is a single extract employed for proportion and mixing commonly, so that a mixture containing the terpene lactones in specific proportion is difficult to obtain economically due to the blind spots in technology, so that a specific combination can be formed by means of calculation of addition amounts of the solvents under a situation that the employed solvent combination is economical. The gingko leaf extract solvent proportional extraction method includes four steps: single-solvent extraction of the terpene lactones, recording of the extraction amount of the single solvent, calculation to obtain the solvent combination, and extraction by means of the solvent combination obtain through calculation and blending of the extracts.