Background: Primary health institutions (PHIs) are the foundation of the whole health system and the basic link to achieve the goal of all people enjoying primary health care. However, the service capability of primary health institutions is not under the hierarchical medical system. Method: Data were collected from the China Health Statistics Yearbook between 2014 and 2020. PHIs included community health centres, community health stations, and township hospitals in our study. The service capability of primary health institutions was analysed from the perspective of structure, process, and results. Structure capability was evaluated using the number of beds, number of personnel, number of health technicians, and proportion of the number of personnel in PHIs accounting for the total number of health personnel. Process capability was evaluated using the number of general practitioners. The number of outpatients and inpatients, medical income, the proportion of drug income, and the average number of patients and beds served by physicians in PHIs per day were employed to evaluate the resulting capability. Results: From 2014 to 2020, the number of community health service centres/stations increased, while the number of township health centres decreased. In the aspect of structure capability, the total number of personnel and health technicians in community health centres/stations and township hospitals both increased during 2014 and 2020. However, the increasing rate in PHIs was a little bit less than that of general medical institutions. The proportion of male health technicians in community health centres and township hospitals both decreased, while the proportion of female technicians in both increased. From 2014 to 2020, the number of beds in PHIs also increased from 138.12 x 10(4) to 164.94 x 10(4). However, the proportion of beds in PHIs accounting for the total number of beds in medical institutions decreased. For the resulting capability, from 2014 to 2019, the proportion of diagnosis and treatment times in PHIs decreased from 57.41% to 51.96%, although it increased in 2020. The proportion of inpatients in PHIs decreased from 20.03% to 16.11%. From 2014 to 2020, the utilisation rate of hospital beds in PHIs decreased (from 55.6% to 34% for community health centres and 60.5% to 53.6% for township hospitals). The average daily bed days of doctors in township hospitals was higher than that of doctors in community health service centres. However, the average medical cost of outpatients and the per capita medical cost of inpatients in community health service centres were higher than in township hospitals. Conclusion: In recent years, although the service capability showed an increasing trend in PHIs, the growth rate was lower than the general health institutions. The utilisation rates of PHIs, including beds and physicians, were decreased. Among PHIs, the utilisation in township hospitals was higher than in community health centres with a relatively low price. Under the hierarchical medical system and normalisation period of the COVID-19 epidemic, it is important to improve the service capability to achieve its goal of increasing PHI utilisation and decreasing secondary and tertiary hospital utilisation.
