Abstract: Objective To analyze risk factors associated with the development of type 2 diabetes mellitus (T2DM) in patients with hepatitis B virus (HBV) infection. Methods Clinical data were collected from HBV-infected patients treated at the Zhoukou City Infectious Disease Hospital (Zhoukou City Tuberculosis Prevention and Control Institute)between January 2024 and May 2025. A total of 95 patients were included in the study, Patients were grouped based on the presence or absence of T2DM following HBV infection. Patients with T2DM were included in the T2DM group (n=21), while those without T2DM were included in the control group (n=74). Baseline characteristics and laboratory test data were compared between the two groups, and logistic regression analysis was performed to identify factors associated with the development of T2DM in HBV-infected patients. Results The age, body mass index (BMI), and triglycerides (TG) in the intervention group were higher than those in the control group (P < 0.05); The proportion of cases with age ≥45 years, obese BMI, HBV infection duration ≥6 months, TG ≥1.7 mmol/L, smoking, hepatitis B surface antigen (HBsAg) positivity, and a FIB-4 score ≥2.67 was higher than that in the control group (P < 0.05). Age ≥ 45 years [OR = 21.599 (95% CI: 2.875–162.262)], BMI (obesity) [OR = 16.729 (95% CI: 1.443–193.981)], duration of HBV infection ≥ 6 months [OR = 6.199 (95% CI: 1.101–34.904)], smoking [OR=9.429 (95% CI: 1.344–66.141)], and TG ≥ 1.7 mmol/L [OR=71.834 (95% CI: 7.060–730.897)] were risk factors for T2DM in patients with HBV infection (P < 0.05). Conclusion The development of T2DM in patients with HBV infection is influenced by a combination of demographic factors (age and BMI), clinical course (duration of HBV infection), comorbid dyslipidemia, and lifestyle factors (smoking).