1.Little trauma, little bleeding, light pain, early feeding and activity on the ground; 2.Fast recovery, little impact on the body’s immune system, short hospitalization; 3.Good laparoscopic illumination, better field of vision than open surgery, safe and reliable surgery, more complete tumor removal and eradication; 4.Convenient whole abdominal exploration during surgery; 5.Small incision scar, good cosmetic effect; no pain in the incision.