Application of perennial sowthistle polysaccharide extract in prevention and treatment of ulcerative colitis

The invention discloses application of a perennial sowthistle polysaccharide extract in prevention and treatment of ulcerative colitis, and belongs to the technical field of medicines. The perennial sowthistle polysaccharide extract disclosed by the invention can be used for effectively treating or relieving the symptoms of ulcerative colitis, including weight change, colon shortening, DAI score, pathological injury and the like; blood routine tests show that the sonchus brachyotus polysaccharide extract improves blood routine parameters of DSS-induced enteritis mice; immune experiment results show that the sonchus brachyotus polysaccharide extract can regulate immune parameters; the 16SrRNA detection shows that after the sonchus brachyotus polysaccharide extract is treated, the intestinal flora composition of the intestinal flora is obviously different from the intestinal flora composition of the intestinal flora of the sonchus brachyotus polysaccharide extract; the metabonomics research result shows that th