直肠癌是目前较为常见的恶性肿瘤，其中低位直肠癌占50%以上，根治性手术是目前最有效的治疗方式。低位直肠癌保肛一直是结直肠外科领域的热点与难点，近年来在保肛率和保肛质量上一直未取得突破性进展，其根本原因是没有良好的手术视野和创新性的手术器械。通过特制器械辅助，精准功能保肛手术可在直视下完成低位直肠癌病灶的精准切除和肠管断端的确切缝合，为低位直肠癌的保肛治疗提供了新方法。

Rectal cancer is a relatively common malignant tumor, of which low rectal cancer accounts for more than 50%. Radical surgery is currently the most effective treatment. Anus-preserving surgery for low rectal cancer has always been a hot spot and a difficult point in the field of colorectal surgery. There has been no breakthrough in the anal sphincter preservation rate and postoperative anal function. The root cause is that there is no good surgical field and innovative surgical instruments. Through special equipment assisted, precision functional sphincter-preserving surgery (PPS) can complete the precise resection of low rectal cancer lesions and the exact suture of the intestinal end of the intestine under direct vision, which provides a new method for anal sphincter treatment of low rectal cancer.