Rectal polyp biopsy for grayish grayish brown tissue piece is not necessarily cancer, need to be judged according to pathological manifestations. Rectal polyp is a kind of proliferative disease, which is manifested as elevated lesion on the surface of rectal mucosa, and can be divided into inflammatory polyp, hyperplastic polyp, adenomatous polyp, misshapen polyp and other types; different types of rectal polyps are mainly differentiated according to pathological manifestations, and the color is not significant to the judgment of pathological types. Inflammatory polyps are caused by inflammation, low possibility of cancer, need to actively treat the intestinal pathogenesis; hyperplastic polyps are benign lesions, generally do not appear cancer, can follow the doctor’s advice to choose polypectomy; adenomatous polyps have a high rate of cancer, belong to pre-cancerous lesions, need to be surgically excised as soon as possible, and regular re-examination to determine whether there is a recurrence. In case of rectal polyps, one should consult a doctor in time and choose the appropriate treatment after various examinations and evaluations, and follow the doctor’s instructions to avoid delaying the condition.