The head-low-foot-high position is suitable for use during lower abdominal or pelvic surgery, such as appendicitis, rectal cancer, ovarian cysts, uterine fibroids and other surgeries. Because the human small intestine is free in the abdominal cavity, if lying flat, the small intestine generally gathers in the lower abdomen and pelvis more, when doing lower abdominal surgery, the small intestine in the abdominal cavity will also affect the surgical field, then it is necessary to use the head low foot high position. The purpose is to allow the small intestine to enter the upper abdomen, thus exposing the lower abdominal field and facilitating the operation, especially when doing gynecological surgery such as rectal cancer and uterine fibroids, which is very obvious when the lower abdomen is completely exposed, so that the rectal tumor can be completely removed.