Patients with esophageal cancer and gastric cancer undergoing chemotherapy were selected as research objects to conduct nutritional risk screening, malnutrition assessment and quality of life assessment. They were randomized into the nutrition counseling group (NC) and the nutrition support therapy group (NST). To evaluate the nutrition and life quality of patients with esophageal cancer and gastric cancer before and after chemotherapy, and to study the effects of nutritional support therapy on nutrition and life quality.

In view of the high incidence of malnutrition in esophageal cancer and gastric cancer and chemotherapy may further aggravate malnutrition and reduce quality of life. According to the inclusion criteria, 280 patients with esophageal cancer and gastric cancer undergoing chemotherapy were selected as research objects to conduct nutritional risk screening, malnutrition assessment and quality of life assessment. They were randomized into the nutrition counseling group (NC) and the nutrition support therapy group (NST). To evaluate the nutrition and life quality of patients with esophageal cancer and gastric cancer before and after chemotherapy, and to study the effects of nutritional support therapy on nutrition and life quality; On this basis, a nutrition and life quality management system for patients with tubular upper digestive tract chemotherapy tumors was constructed, and the system was objectively evaluated from the clinical point of view, so as to provide a feasible scheme for improving the nutrition and life quality of patients with tubular upper digestive tract chemotherapy tumors.

Inclusion Criteria:

• Esophageal or gastric cancer confirmed by histology or cytology;
• Age 18-75 years old, gender unlimited;
• Blood routine: hemoglobin ≥90g/L, absolute neutrophil count (ANC) ≥1.5×109/L, platelets ≥100×109/L; (2) Liver and kidney function: alanine transaminase（ALT）, glutamic-oxalacetic transaminease（AST）≤2.5 times the normal upper limit (with liver metastasis ≤5 times the normal upper limit); ALP≤2.5 times the normal upper limit (≤5 times the normal upper limit for patients with liver or bone metastasis); Serum total bilirubin (TBIL) was less than 1.5 times the normal upper limit. Serum creatinine (SCr) < 1.5 times the upper limit of normal; ③ Blood biochemistry: Serum albumin (ALB) ≥30g/L;
• Predicted survival of more than 3 months; It is planned to continue chemotherapy for >3 cycles in the hospital or outpatient department
• All patients participated in this study voluntarily and signed informed consent.

Exclusion Criteria:

• Other tumors, including pancreatic cancer, liver cancer and other solid digestive tract tumors, colon cancer, rectal cancer and other tubular lower digestive tract tumors;
• Have serious heart, lung and brain diseases; Complicated with chronic hepatitis, cirrhosis, chronic nephritis, renal insufficiency, etc.
• Fever associated with infection; Have difficult-to-control diabetes or other metabolic diseases;
• Patients with unstable vital signs and multiple organ failure;
• The patient has poor cognitive ability and is unable to answer questions or fill out questionnaires.
• The investigator believes that the subjects have a history of other serious systemic diseases or are not suitable for participating in this clinical study for other reasons