Abstract: With the enhancement of people's health awareness and the improvement of medical diagnostic technology,the number of early gastric cancer (EGC) cases keeps increasing year by year.Function-preserving gastrectomy (FPG) can achieve R0 resection and lymphadenectomy,but it limits the extent of gastrectomy and preserves the pylorus and vagal nerve,thus preserving gastric anatomy and function.The surgical type of FPG includes pylorus preserving gastrectomy (PPG),proximal gastrectomy (PG),segmental resection (SG) and local resection (LG).In addition,both endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD)are also considered to belong to the scope of FPG.Since most of EGC patients will have long-term survival after operation (five-year survival rate > 90%),it is of great significance to preserve partial gastric function under the premise of radical gastrectomy so that the postoperative quality of life of EGC patients can be improved.