Abstract: Objective To provide the evidence of improving the service for active service in-patients by studying their hospital admission requirement characteristics in large general hospitals. Methods The clinical data about 4 526 cases of active service patients admitted to our hospital in 2012 were retrospectively analyzed. Results The number of male active service in-patients was significantly greater than that of female active service in-patients. The number of divisional and regimental active service patients was greater than that of other rank active service patients. The patients were admitted mainly from outpatient department and 67.60% of them were admitted on the very day they visited our hospital. Most of the patients were admitted to departments of cardiology, obstetrics and gynecology, respiratory diseases, oncology, general surgery, orthpedics, ophthalmology, otorhinolaryngology, gastroenterology, and neurology. Conclusion The majority of active service patients can be admitted to our hospital in time. The use of hospital beds can be improved by rational adjustment and allocation.