Abstract:  Adenocarcinoma of esophagogastric junction (AEG) refers to the tumor invading the esophagogastric junction and Siewert type is the most practical classification at present. There are many surgical controversies about AEG, mainly focusing on Siewert Ⅱ type. In this paper, definition and classification of AEG,epidemiological characteristics, pathological TNM staging, rules of lymph node metastasis and dissection, esophageal resection margin, gastric resection scope, surgical approach and other issues are investigated combined with recent high-quality evidence.