In order to establish an experimental model to study the digestion and absorption of dietary nutrients by the large intestine of pigs,the changes of metabolism of pigs after the removal of large intestine were observed,to study the contribution of large intestine to nutrient metabilism,a set of surgical procedures were adopted to remove the large intestine of pigs,perform ileorectal anastomosis,and install the mesentery,portal vein and femoral artery three-site vascular fistula.The results showed that after successful operation and 1 week after operation,the experimental pigs recovered well wi...