This study aims at examining changes in coronary heart disease (CHD) hospitalisation associated with a novel county-scale chronic disease management (CDM) program policy implemented in March 2019 in China during the Thirteenth Five-Year period (Years 2016-2020). The CDM program was designed to improve the health of populations with chronic diseases by means of an integrated way involving both county-level public hospitals and primary care institutes. Data originated from the medical files of CHD inpatients discharged from a secondary hospital from January 2017 to December 2020. A total of 6,111 CHD patient records was collected. Univariate and multivariate regression analyses were performed to assess changes in hospitalisation direct medical costs and length of stay of CHD patients. The mean direct medical cost of CHD hospitalisation was 8,419.73 Yuan and mean length of stay was 7.57 days. Results suggested that the implementation of CDM reduced hospitalisation direct medical cost and bed days by about 23% (1,956.12 Yuan at means) and 11.5% (almost 1 day at means) respectively. In addition, a further decreasing trend in medical cost over time was associated with chronic disease management. It is implied that chronic disease management is an effective way of relieving medical and financial burden of hospitalisation.