Method for extracting procyanidine based on cranberry pomace

The invention belongs to the field of plant extraction, and particularly relates to a method for extracting procyanidine based on cranberry pomace, the method comprises the steps of water extraction, column chromatography separation, concentration and drying, the water extraction at least comprises three times of water extraction processes, the first water extraction process adopts a low-temperature water extraction process, the first water extraction temperature is 40-50 DEG C, and the second water extraction process adopts a low-temperature water extraction process; high-temperature water extraction is adopted for the second water extraction and the third water extraction, the temperature of the high-temperature water extraction is 95-100 DEG C, and an extracting solution obtained after water extraction is subjected to column chromatography adsorption and desorption and then is concentrated and dried to obtain a final extract; compared with the prior art, the method for extracting procyanidine based on cran