Objective: This study aimed to evaluate the safety and short-term outcomes of pelvic peritoneum reconstruction with barbed sutures in laparoscopic rectal resection for rectal cancer. Methods: This is a retrospective cohort study conducted in Chengdu second’s people hospital. The clinicopathological data of 402 patients with rectal cancer admitted to our department hospital from January to December 2019 were collected. There was total of 402 patients, including 218 males and 174 females, with an average age of 68 years. Among them, 216 patients who underwent laparoscopic rectal resection with pelvic peritoneum reconstruction (PPR) were allocated into the PPR group, and 186 patients who underwent conventional laparoscopic rectal resection were allocated into a non-PPR group. All the patients received standard preoperative and postoperative treatments. Observational indicators (1) surgical and postoperative conditions; (2) postoperative pathological examination. (3) postoperative complications. Results (1) Surgery condition: all patients in the two groups underwent successful surgery without conversion to open surgery. There were no differences between the two groups in terms of surgical approach, resection margin, tumor size, postoperative T-stage, postoperative N-stage, positive lymph nodes, harvest lymph nodes, perineal wound infection, perineal hernia, postoperative pneumonia, postoperative hemorrhage, presacral fluid, or abscess. The operative time, blood loss, the incidence of anastomotic leakage, and small-bowel obstruction showed a significant difference between the two groups. Conclusion pelvic peritoneum reconstruction with barbed suture in laparoscopic rectal resection is safe and feasible for the treatment of rectal cancer, which can significantly reduce postoperative perineal-related complications.