Abstract: Bariatric surgery is effective on obesity, which can significantly improve the metabolic diseases of obesity patients, especially the type 2 diabetes. However, the surgical proce-dures of bariatric and metabolic surgery are still evolving and in progress. One anastomosis gastric bypass (OAGB) is the latest bariatric surgery recognized by the international bariatric and metabolic surgery community. The authors review the relevant literatures at home and abroad, and introduce the development history, surgical skills, clinical efficacy, status quo and adaptability of OAGB.