Chronic diarrhea caused by erosive gastritis can be treated with drugs that inhibit gastric acid secretion, protect the gastric mucosa, and regulate bacterial flora. 1. Inhibit gastric acid secretion drugs: when patients with erosive gastritis, gastric acid secretion, gastric mucous membrane stimulation leads to gastrointestinal peristalsis caused by diarrhea, then the patient can use such as: omeprazole, rabeprazole, ranitidine and other inhibitors of gastric acid secretion drugs for treatment. 2. Drugs to protect the gastric mucosa: patients can also use drugs to protect the gastric mucosa for treatment, such as: magnesium aluminum carbonate, aluminum thiosulphate and other drugs, which can neutralize the gastric acid, forming a protective layer on the surface of the gastric mucosa, preventing gastric acid from stimulating the gastric mucosa, reducing gastrointestinal peristalsis and alleviating the symptoms of diarrhea. 3. Regulate flora drugs: patients can also use drugs to regulate intestinal flora for treatment, such as: bifidobacteria, lactobacillus, bacillus subtilis and other probiotic preparations, which can regulate the balance of intestinal flora and reduce the occurrence of diarrhea. The above drugs can not be used without authorization, need to be used under the guidance of a doctor to avoid adverse consequences.