To evaluate the nutritional status of patients with different types of tumors by continuous nutritional intervention and follow-up intervention in the perioperative period,and the impact on progression-free survival/survival and quality of life.

Inclusion Criteria:

• ① Age ≥18 years old, <80 years old, male or female; ② The patient signed the informed consent and volunteered to participate in the study; ③ Patients with malignant tumors (laryngeal cancer, esophageal cancer, lung cancer, gastric cancer, colorectal cancer, liver cancer, pancreatic cancer) evaluated by clinical stage II to IV; ④ Patients undergoing tumor surgery; ⑤ Patients with NRS 2002 score ≥ 3 after management risk screening; ⑥ Basic reading and communication skills; ⑦ Have the ability to act; Patients with a life expectancy greater than 6 months;

Exclusion Criteria:

• ① Acute onset of chronic disease; ② Pregnant or lactating women; ③ Patients with contraindications and no tumor surgery; (4) Patients with malignant tumors (laryngeal cancer, esophageal cancer, lung cancer, stomach cancer, colorectal cancer, liver cancer, pancreatic cancer) were confirmed by pathology and/or cytology after surgery; ⑤ Combined with cognitive dysfunction, mental disorder, consciousness disorder or unwillingness to cooperate; ⑥ Patients with severe gastrointestinal symptoms, liver and renal insufficiency (alanine aminotransferase ALT≥2 times the upper limit of normal value; Total bilirubin Tbil≥2 times the upper limit of normal value; Creatinine Cr≥2 times the upper limit of normal value); (7) Patients with two or more types of tumors; Long-term bed rest, hemiplegia or coma; ⑨ Severe dysfunction of liver, kidney and other organs; ⑩ Allergy or intolerance to nutrients or their main components (such as lactose or galactose, etc.).