Objective To analyze the composition and influencing factors of the hospitalization expenses of patients with cardiovascular and cerebrovascular diseases who has participated in basic medical insurance, and to provide evidence for controlling excessive increase in the hospitalization expenses and reducing the financial burden of patients. Methods The hospitalization information of 14,271 insured patients with cardiovascular and cerebrovascular diseases from January 1, 2019 to December 31, 2019 in Xianning City, Hubei Province was retrospectively collected. The basic information of the patients and the composition of their hospitalization expenses were descriptively analyzed, and the influencing factors of hospitalization expenses of the patients were analyzed by univariate analysis and logistic regression analysis. Results Among the patients included in the study, coronary heart disease, cerebral infarction, cerebral hemorrhage and essential hypertension were the four main types of cardiovascular and cerebrovascular diseases with the largest proportion of hospitalization expenses, accounting for 26.18%, 20.29%, 11.82% and 9.94%, respectively. The largest proportion of hospitalization expenses was treatment expenses and drug expenses, accounting for 44.09% and 32.52%, respectively. Logistic regression analysis showed that age, length of stay, type of insurance, type of cardiovascular and cerebrovascular diseases, whether there were other comorbidities or complications, and whether they visited tertiary medical institutions were the influencing factors of hospitalization expenses for patients with cardiovascular and cerebrovascular diseases. Conclusion It is necessary to strengthen the disease prevention and control for the elderly and patients with cardiovascular and cerebrovascular diseases such as coronary heart disease, cerebral infarction, cerebral hemorrhage and essential hypertension, accelerate the integration of the basic medical insurance system, scientifically and reasonably shorten the length of hospital stay, and strengthen the promotion of the hierarchical medical system.