With changes in lifestyle and dietary structure, the global prevalence of nonalcoholic fatty liver disease (NAFLD) is increasing year by year, posing a serious burden on health care systems. While clinicians' understanding of the pathophysiological mechanisms of NAFLD continues to improve, effective treatments are still being explored, and lifestyle interventions remain the first-line therapy for NAFLD as recommended by numerous guidelines and physicians. Sleep is a complex, highly regulated process that is critical to human health. There is a growing consensus that sleep disorders are closely associated with chronic liver disease, especially NAFLD. However, it is not clear how sleep disorders affect NAFLD. Therefore, the purpose of this paper is to review the relationship between sleep disorders and NAFLD and to enable NAFLD patients to make lifestyle changes, which will benefit NAFLD patients.