To discuss the law of TCM treatment according to the syndromes and the mechanism of auricular acupuncture in the treatment of prediabetes.Methods:Through the review of the literature on acupuncture treatment of prediabetes in the past 10 years,we summarized the rules of acupoint selection and methods of acupuncture in the treatment of prediabetes,especially for the auricular acupuncture,and discussed the mechanism of auricular acupuncture in the treatment of prediabetes.Results:Auricular acupuncture is a common method to reduce blood sugar in clinical practice,it has significant effect and unique advantages on the treatment of prediabetes.The acupuncture points are mainly endocrine,pancreas,triple-burner,stomach,and spleen related,which can reduce blood sugar by affecting the nervous system and endocrine system.Conclusion:Auricular acupuncture is a commonly used method for the treatment of prediabetes in acupuncture therapy.Its unique advantages are worthy of clinical promotion.But it is also expected to optimize and improve the stimulation methods and treatment plan of prediabetes.