On the first day after appendicitis surgery, you can eat fluids, on the second day you can eat pasta, on the third day you can eat semi-fluids, and on the fourth and the fifth day you can gradually return to the preoperative diet. 1. On the first day, if there is flatulence, gastrointestinal function is considered to have recovered, generally consume fluids, such as drinking water and fish soup, etc., but do not use milk and soybean milk, and if there is a bad feeling, then immediately stop eating and ask the doctor. If there is no gas on the first day after surgery, do not eat for the time being and wait for the doctor’s evaluation. 2. Use pasta on the 2nd day: if there is no bad feeling on the 1st day, then you can eat some pasta food on the 2nd day, such as steamed buns, bread, etc., and you can also eat pickled vegetables and squash. 3. The 3rd day using semi-fluid food: the 3rd day then you can carry out some semi-fluid food such as noodles, at the same time you can add some vegetables, such as celery, leeks, etc., to observe whether there will be adverse reactions. 4. Day 4 and 5: If there is no adverse reaction on the 3rd day, you can eat ordinary food on the 4th and 5th day, and consume more food containing vitamin C, which can be conducive to the healing of the wound, and consume more vegetables and fruits at the same time. After the operation, you need to ventilate before you can consider eating. It is recommended to wait for the doctor’s checkup before deciding whether to eat or not after the operation, and consult the doctor in time if you feel unwell.