Pomelo seed polysaccharide extraction process

The invention discloses a pomelo seed polysaccharide extraction process which comprises the steps: drying pomelo seeds, crushing to obtain pomelo seed powder, carrying out degreasing treatment on the pomelo seed powder, carrying out water extraction combined with an enzyme method, simultaneously carrying out ultrasonic extraction to obtain seed polysaccharide, and sequentially carrying out deproteinization and desalination treatment on the obtained crude polysaccharide, finally obtaining purified pomelo seed polysaccharide through ion exchange chromatography and molecular sieve chromatography. According to the process, degreasing pretreatment, hot water extraction, enzyme extraction and ultrasonic extraction are adopted so that the extraction time and cost of the pomelo seed polysaccharide are greatly reduced, and the extraction rate is increased. According to the process the grapefruit seeds are used as a new polysaccharide resource, so that the process has a wide utilization prospect, and has a positive pro