Abstract: Objective To study the seasonality and route of admission for inpatients with socialized medicine coverage in Chinese PLA General Hospital, and improve the hospital performance． Methods Altogether 12 236 inpatients with socialized medicine coverage from 2013 to 2015 were included in this study, and their medical data were analyzed retrospectively． Results The inpatient volumes of different departments varied obviously． Respiratory, cardiology, orthopedics, oncology, obstetrics, gastroenterology departments ranked the top 6 in patient volume ranking, and respiratory department and cardiology department accounted for 30% of the total volume of the hospital． The inpatient volumes in summer season or winter season were higher than those in the other two seasons, and seasonality of inpatient admissions also varied among different departments． For respiratory, cardiology, and gastroenterology departments, admission volumes peaked in spring and winter seasons, whereas they peaked in summer and autumn seasons in orthopedics, oncology and obstetrics departments． Outpatient route accounted for 63．55% of the total volume of in patients with socialized medicine coverage． However, for obstetrics, cardiology, neurology and gastroenterology departments, emergency admission was the main route． Conclusion Understanding the seasonality, department variation and routes of hospital admission for inpatients with socialized medicine coverage can help us improve the health care planning．