Abstract: Objective To investigate the effect of  pararectus approach in the operation of pelvic extraperitoneal soft tissue tumors.Methods A retrospective analysis of pelvic peritoneum in our hospital from January 2012 to January 2017， the application of lateral rectus approach in the 19 patients’ treatment of soft tissue tumors.Single rectus approach was performed in 5 cases， pararectus approach+extended approach in 8 cases，pararectus approach combined with posterior K-L approach in 6 cases.Results 19 cases of pelvic retroperitoneal soft tissue tumors were completely resected，incision length 9～23cm，operation time 90～210min，bleeding 420～1240ml，there were no nerve injury，pelvic organ injury，deep vein thrombosis or other complications，2 cases had femoral vein injury and intraoperative timely repair，postoperative VAS score（3.4±0.8）was significantly lower than the preoperative VAS score（7.3±1.6）.19 patients were followed up，the follow-up time was 8～58 months[（26.0±5.8）months]，14 patients without recurrence，2 cases of local tumor recurrence，and again underwent surgical resection，3 cases of malignant tumor patients with distant metastasis and death.Conclusion The pararectus approach can quickly enter the pelvic retroperitoneal space.Compared with other surgical approaches of the pelvis，the palpable anatomical structure is more extensive，and it is suitable for the resection of pelvic retroperitoneal soft tissue tumors.

Key words: pararectus approach, pelvic retroperitoneal, soft tissue tumor, surgery