Objective:To translate the Decisional Balance Scale for Diabetes Diet (DB-DD) into Chinese, and test its reliability and validity.Methods:After obtaining the authorization of the author of the source scale, the scale was sinicized by translation and back translation method. After expert consultation, cognitive interview and pre-survey for cultural adjustment, the Chinese version of DB-DD scale was formed. From September 2020 to January 2021, a total of 496 patients with type 2 diabetes mellitus in endocrinology department of 4 Class Ⅲ Grade A hospitals in Guangdong province were surveyed by the convenient sampling method to evaluate the reliability and validity of the scale. A total of 496 questionnaires were sent out and 440 were effectively received, with the effective recovery of 88.7%.Results:There were 12 items in the Chinese DB-DD, including 2 dimensions of benefit (6 items) and damage (6 items) . The content validity index of the total scale was 0.98, and the content validity index of the item level was 0.86 to 1.00. The correlation coefficients of the Chinese version of DB-DD total scale, benefit subscale and impairment subscale and diabetes self-management behavior scale were 0.413, 0.222 and -0.221, respectively ( P<0.001) . The Cronbach's α coefficients of the total scale and each subscale were 0.730-0.899 and the split-half reliability coefficients were 0.725-0.856. The test-retest reliability coefficient of the total scale was 0.916 and the test-retest reliability coefficients of the benefit and damage subscales were respectively 0.933 and 0.902. Conclusions:The Chinese version of Decisional Balance Scale for Diabetes Diet has good reliability and validity, which can be used to evaluate the dietary decision balance of diabetic patients in the Chinese cultural context.