Gastric cancer patients after total gastrectomy at discharge, if she/he has nutrition risk (NRS2002≥3), then she/he will be randomized to oral nutritional supplement (ONS) group or control (C) group after discharge. In the ONS group, in addition to diet, and patients will also consume enteral nutritional powder (500ml/d，500kcal/d) lasted for 6 months. In the C group, patients will receive normal diet. Both groups will receive nutrition counseling.~The primary and secondary outcomes will be collected.
Gastric cancer patients after total gastrectomy will be randomized to oral nutritional supplement group or control group at discharge. Patients will receive 6 months of oral nutritional supplement or normal diet after discharge. The primary and secondary outcomes will be collected.