Objective: The paper investigates the utilization of inpatient services for patients with Alzheimer's disease, analyzes the factors affecting the utilization of inpatient services and expenses, and provides scientific basis for optimizing the utilization of inpatient services for Alzheimer's disease.Methods: The Alzheimer's disease inpatients came from The National Survey Database on Use of Basic Medical Insurances and Medical Services, released by China Health Insurance Research Association(CHIRA). We classified patients' basic information and inpatient service utilization by statistical description methods, analyzed influencing factors of hospitalization expenses by quantile regression.Results: The frequency of hospitalizations was 1 (1) time, average length of hospital stay was 17 (32) days, and the hospitalization cost was 16002 (16602) yuan of Alzheimer's disease inpatients. Average length of hospital stay affects hospitalization cost at each quantile point, and the age at the low quantile point affects hospitalization cost. Regional classification, diagnostic classification, insurance type, and hospital level affect hospitalization cost at the high quantile point.Conclusion: Patients with Alzheimer's disease had a high degree of utilization of inpatient services, relatives of patients with early-onset disease should be the key population for AD screening, and there are big differences in the type of insurance and regional distribution of hospitalization expenses.