Generally, biopsy is needed after removal of polyps in gastroscopy, which is to understand the pathology of gastric polyps and further determine whether there is cancer. Gastric polyps are papillary tissue protruding from the surface of the gastric mucosa. The pathology of gastric polyp is categorized as hyperplastic and adenomatous. Generally, most of them are hyperplastic and benign due to the long-term chronic inflammatory stimulation leading to mucosal hyperplasia and the formation of polypoid elevation. Adenomatous polyps have the potential to become cancerous. Therefore, after removing the polyp by gastroscopy, it is impossible to recognize the polyp by naked eyes only, and it is necessary to take biopsy to determine the pathology of gastric polyp, and then further determine whether there is the risk of cancer. It is recommended to follow the doctor’s advice and conduct the examination to rule out high-risk situations to avoid missed diagnosis and misdiagnosis.