Objective To investigate the relationship of education level with erectile dysfunction (ED) of male patients with type 2 diabetes. Methods A total of 800 male diabetic patients accepted information inqury, physical examination and blood sample detection. All the patients were classified into junior school educated group, high or moderate school educated group, and college group. Their erectile function was evaluated with international index of EF (IIEF-5) and its relationship with culture level was analyzed by SPSS19.0. Results ED was found in 202 patients of the junior school educated group, 130 patients of the high or moderate school educated group, and 210 patients of the college group. The analysis of rank sum test showed that the mobidity of ED in the junior school educated group was significantly higher than that in the high or moderate school educated group and the college group. Conciusions Education level plays an important role in the development of ED in male patients with type 2 diabetes.