The vascular management strategy of radical sigmoid colon cancer has an important impact on the surgical outcome and postoperative complications. The strategy mainly involves the management of the inferior mesenteric artery (IMA) and its branches such as left colonic artery (LCA), sigmoid artery (SA) and superior rectal artery (SRA). Available studies have shown that preservation of the LCA and SRA improves anastomotic blood supply and reduces the risk of anastomotic fistula. However, some authors have suggested that this procedure significantly increases surgical complexity and may compromise the oncological cure of complete mesenteric excision. Therefore, the oncological safety of the procedure needs to be weighed against the haemodynamic benefits. Robot-assisted surgery, with its high-definition 3D imaging, precise operation, and robotic arm stability, plays a significant advantage in preserving blood vessels and D3 (group 253) lymph node dissection in radical sigmoid colon cancer. It is of profound clinical significance to explore the value of robotic-assisted technology in radical sigmoid colon cancer surgery.