Gastrointestinal flu in children is mainly due to the infection of coxsackie virus, which leads to the symptoms of upper respiratory tract infection combined with obvious gastrointestinal reactions. It is recommended to eat a liquid diet, such as milk and gruel, and eat easily digestible vegetables, such as spinach and cabbage, etc. Do not eat greasy, spicy, stimulating and indigestible food. In terms of treatment, you can take patchouli orally to improve the symptoms, and if the child has obvious diarrhea, you can take montelukast orally to stop the diarrhea. If bacterial infection is combined, cefixime can be used in combination to control the infection. It is important to actively rehydrate the child to prevent deficiency and electrolyte disorders, and to monitor electrolytes in a timely manner and correct any abnormalities.