【Overview】Most of the malignant obstruction of the digestive tract is due to its primary malignancy, recurrence of anastomosis after tumor resection, and infiltration and compression of surrounding malignant tumors. It seriously affects the quality of life and survival of patients. Gastrointestinal stenting is a minimally invasive non-surgical method to relieve the narrowing and obstruction of the gastrointestinal tract, so that patients can avoid the damage caused by surgery and the detention of drains and pouches, and it is a palliative treatment to relieve the symptoms and improve the quality of life for those who have no indication for surgery or are too weak to bear surgery, especially for those who have extensive adhesions in the chest and abdominal cavity due to repeated surgeries. For patients with colorectal cancer obstruction, especially acute obstruction, stenting can effectively relieve the obstruction, avoid emergency surgery, and create conditions for staged diagnosis and elective surgery. Preoperative preparation】Improve the relevant examination, sign the informed consent for treatment before surgery, and understand the purpose and complications of stenting. Patients should fast for 12 hours and abstain from water for 6 hours before surgery. Patients with upper gastrointestinal tract treatment should be given lidocaine syrup 5 minutes before surgery. Patients with lower gastrointestinal tract treatment should have appropriate bowel cleansing. Postoperative treatment】 Postoperative fasting should be followed by water fasting and gradual transition from liquid food to semi-liquid food after feeding is possible. Give rehydration, apply acid suppressants, mucosal protectors and other medications, and closely observe the occurrence of bleeding, perforation, infection, such as: fever, chest pain, abdominal pain, blood in stool, etc.