Objective To explore the correlation of 25-hydroxyvitamin D[25-（OH）D] level in predicting the occurrence of diabetic peripheral neuropathy．Methods A total of 200 patients with type 2 diabetes mellitus（T2DM）who were admitted to Community Health Service Center of West Nanjing Road,Jing’an District,Shanghai from June 2021 and December 2021 were selected as the study subjects．According to physical examination,blood biochemistry,neurological symptom score and electromyography,the patients were divided into two groups：no peripheral neuropathy group（n=153）and peripheral neuropathy group（n=47）．The general data and serum baseline 25-（OH）D levels of the two groups were compared to analyze the correlation between 25-（OH）D and diabetic peripheral neuropathy．The predictive value of 25-（OH）D in diabetic peripheral neuropathy was analyzed by Logistic regression．Results There were significant differences in baseline 25-（OH）D level,fasting blood glucose（FBG）,HbA_1c and SBP between two groups（P<0.001）,but no significant differences in age,sex,BMI,waist circumference,postprandial plasma glucose,AST,C-peptid total cholesterol,HDL-C,triglyceride,LDL-C,Scr,UA and DBP between two groups（P>0.05）．Baseline 25-（OH）D level was negatively correlated with MDNS score（r=-0.583,P<0.001）,and FBG was positively correlated with MDNS score（r=0.303,P<0.001）．Logistic regression analysis showed that the DPN risk decreased by 25% for every unit increase of 25-（OH）D,and the correlation remained after timely adjustment for sex,age,HbA_1c,and LDL-C．Conclusion sThe level of 25-（OH）D is negatively correlated with the occurrence and development of diabetic peripheral neuropathy,and the detection of serum 25-（OH）D level can be used as an important indicator to predict the occurrence and development of urinary peripheral neuropathy．