Extracting method of proteins in green tea dregs

The present invention discloses an extracting method of proteins in green tea dregs. The extracting method comprises the following steps: S1. enzymolysis: the green tea dregs are subjected to enzymolysis and wall breaking treatment by using the enzymolysis technology; S2. alkaline extraction: the enzymolyzed green tea dregs are continuously subjected to the alkaline extraction to extract green tea proteins to obtain an green tea protein extract; S3. acid precipitation: the obtained green tea protein extract in the S2 is subjected to the acid precipitation to obtain a precipitate; S4. desalting: the obtained precipitate in the S3 is subjected to desalting; and S5. decolorization: 75% acetoneis used to conduct the decolorization of the desalted green tea proteins in the S4 to obtain green tea proteins. The enzyme and alkali compound extraction method combines the enzymatic method and the alkali method. Firstly, the enzymes are used to conduct wall breaking treatment of the green tea dreg cells, which is benefic