To discuss the efficacy and application prospect of columnar suturing plus shame rectum seton for constipation induced by internal rectal mucosa prolapsed. Methods:Thirty six patients were randomized to receive present operation, or punctate ligation as control, put under symptoms and physical signs observation, and other auxiliary examinations before and after treatment. Results:The treatment group had significantly better therapeutic effect than the control group right after the operation and in 3-month follow-up (P<0.01, P<0.05 respectively). Conclusion: The present operation has better efficacy than the traditional operation, thus is preferable for outlet obstructive constipation induced by internal rectal prolapsed.