Abstract: After more than 30 years of standardized exploration, the surgical treatment of gastric cancer has developed from early resection to expanded resection, and to the current more accurate individualized surgery 3.0 stage. In this process, not only has the scientific research spirit and sense of mission of scholars in the industry to keep improving, but also benefits from the development of laparoscopy, robotics, bioengineering, electronic display and other technologies. The concepts of "microanatomy", "membrane anatomy", "mesangium" and "level operation" have been constantly proposed. These concepts have been gradually recognized and paid attention to by scholars at home and abroad, but inevitably in the basic concept and practical operation, there are many problems of fuzzy fields and standards are not uniform, and operation is difficult to standardize. Based on the previous research foundation of the team, the authors collaborate with the School of Basic Medicine of Shanxi Medical University to explore the normative concepts related to the occurrence and anatomy of the gastric cancer, and propose the concept of "mesangial" excision with 6 mesanges and 8 blood vessels fascia margins for discussion.