Patients with advanced gastric cancer can eat different kinds of food according to their specific conditions. If patients with advanced gastric cancer have not undergone surgery and the tumor cells have not caused obstruction of the pylorus, the food eaten by patients can be excreted into the duodenum and jejunum through the stomach. In this case, patients can eat liquid food such as thin porridge, rice soup, noodle soup, rotten noodles, rice paste, rice flour and so on in small amount to supplement the nutrition of patients as much as possible. Secondly, if a patient with gastric cancer has complete obstruction of the pylorus, in this case, the food eaten by the patient cannot reach the small intestine through the pylorus, and too much food will cause rapid expansion of the stomach, resulting in severe vomiting and nausea. At this time, the patient cannot take any food and water by mouth, and can only maintain life through intravenous rehydration.