Extraction method of tea saponin and application of tea saponin in oil extraction of oil field

The invention discloses an extraction method of tea saponin and application of the tea saponin in oil extraction of an oil field, and belongs to the technical field of tea saponin extraction. Comprising the following steps: crushing camellia oleifera seed meal, adding the crushed camellia oleifera seed meal into an enzyme-containing extracting solution to obtain a mixed solution, heating the mixed solution, carrying out stirring extraction, and filtering to obtain filter residues and an extracting solution, adding an enzyme-containing extracting solution into the filter residues again, heating, stirring and extracting, and filtering again to obtain filter residues and an extracting solution; and repeatedly heating the filter residues, stirring and extracting, and collecting an extracting solution, namely a tea saponin solution, so that the extraction of tea saponin is realized. According to the method, the oil-tea saponin is obtained by utilizing the oil-tea waste through a low-pollution aqueous enzymatic met