ObjectiveTo explore necessity, safety, and clinical significance of pelvic floor reconstruction following laparoscopic abdominoperineal resection for low rectal cancer. MethodsThirty-seven patients with low rectal cancer admitted to our hospital from July 2013 to January 2016 were collected, who were divided into reconstruction group and non-reconstruction group according to the pelvic floor reconstruction or not. The complications were compared in two groups. ResultsThe laparoscopic abdominoperineal resections were successfully completed in all the patients with low rectal cancer, there was no case of conversion to open surgery. The operative time was (173.6±18.3) min, the suture time of pelvic floor peritoneal was (28.6±7.5) min. The postoperative following-up was 3-24 month. There were 5 cases (22.7%) of complications in the non-reconstruction group, included 2 cases of adhesive intestinal obstruction, 1 case of perineal incision hernia, 1 case of pelvic effusion and infection, 1 case of radiation enteritis caused by radiotherapy. There was 1 case (6.7%) of adhesive intestinal obstruction in the reconstruction group. Although the incidence of postoperative complications in the reconstruction group was lower than that in the non-reconstruction group, there was no significant difference between these two groups (χ2=2.367, P=0.096 1). ConclusionThe preliminary results of limited cases in this study show that it is not essential for pelvic floor reconstruction following laparoscopic abdominoperineal resection for rectal cancer, but it could obviously decrease difficulty of operation for postoperative reoperation, especially for postoperative radiotherapy patients, and prevent occurrence of radiation enteritis. It is still necessary because it is more consistent with principle of open surgery, Hem-o-lok 3-0 Angiotech Quilltm clip or barbed suture closure of pelvic peritoneum, it is technically safe and feasible.