Gastroscopic histopathology is the preferred diagnostic modality for patients with gastric cancer, and the chance of confirming a cancer diagnosis is about 80%. Gastric cancer is a common malignant tumor of the digestive system, and the disease can be caused by Helicobacter pylori infection, bad dietary habits and other factors. The preferred method to diagnose the disease is to take biopsy under gastroscope and carry out pathological tissue examination, and the probability of diagnosing gastric cancer by this method is about 80%. It is recommended that patients should go to regular hospitals for regular medical checkups. If tumor lesions are detected at an early stage, standardized diagnosis and treatment can be carried out in accordance with the advice of specialists in a timely manner, which can prolong the time of survival and improve the quality of life, and avoid the delay of the disease.