Parenteral nutrition PN is irreplaceable in clinical nutrition support treatment and it is also the main way of nutritional support for patients who cannot orally eat for a long time. For patients with chronic wasting diseases especially those with short bowel syndrome the advancement of home PN has greatly increased the chances of survival. After more than 40 years of development clinicians should consider the patient's quality of life in addition to reducing complications and improving nutritional intake when choosing the path of PN. Implantable venous access port PORT is a closed intravenous infusion device that is completely implanted in the human body and placed under the skin. It has the advantages of low risk of infection high convenience in life simple maintenance and long service life. It is currently often used for patients who require long - term infusion therapy and multiple hospitalizations because it can minimize the irritation of drugs to patients' blood vessels. It has been proved that patients only need to receive a small operation of 15-20 minutes to implant the PORT with low maintenance cost of 6000-8000 yuan. And a PORT can be used repeatedly for more than 10 years on average. Based on the suitable population indications implantation methods and routes of the infusion port this article proposes guiding opinions on the use of the infusion port in clinical work and explores the possibility of the infusion port in the long-term parenteral nutrition use of adult patients.