Cardia cancer is an adenocarcinoma located within the junction of stomach and esophagus. There is no absolute contraindication in diet one month after operation, mainly avoiding stimulating ingredients and choosing light food. 1. Avoid stimulating ingredients: no alcohol, carbonated drinks, strong tea, coffee, chili peppers, fried food and smoked food, avoiding too cold, too hard, too greasy and too sweet food to reduce the stimulation to the digestive tract. 2. Choose light food: Diet should be based on light and easy to digest and absorb food, and to ensure balanced nutrition, eat small meals, chew slowly, daily vegetables, fruits, congee, dairy products, seafood, meat products and so on can be added appropriately. If uncomfortable symptoms occur one month after the operation, you should consult a doctor in time.