Amoxicillin plays a therapeutic role for diarrhea because infectious diseases of the digestive system are a common cause of diarrhea symptoms. As a broad-spectrum antibacterial drug, amoxicillin has anti-inflammatory and bactericidal effects on a variety of sensitive bacteria in the digestive tract, such as Streptococcus haemolyticus, Salmonella spp. However, before choosing antibiotics for treatment, it is recommended to go to the hospital for blood routine, stool culture and other bacterial culture analysis to confirm the type of causative bacteria, and then choose the targeted antibiotics for symptomatic treatment to avoid antibiotic abuse, resulting in adverse effects. In addition, for patients with diarrhea symptoms, it is necessary to combine the treatment with antidiarrheal agents, water-electrolyte balance regulators, anticholinergic and other types of drugs, such as Kang abdominal anti-diarrheal tablets, oral rehydration salt solution, atropine sulfate tablets, etc., according to the actual performance of the disease.