Atrial fibrillation is the most common arrhythmia disease and the main cause of cardiogenic stroke. Atrial fibrillation seriously affects the life quality of patients, and its complications are highly crippled and lethal, which has become a serious public health problem. Overweight and obesity are substantial cardiovascular disease risk factors, and this topic has become a major focus in recent years. In this review, the association between obesity and auric fibrillation was discussed.