BACKGROUND: Improving primary health care (PHC) physician's capacity has been identified as an important area in the healthcare reform. The continuing medical education (CME) training programs are conducive to enhancing competence of PHC physicians. But few studies have explored PHC physicians' needs and preferences for CME training programs. This study aimed to explore the preferences for CME training programs from the perspective of PHC physicians, and to understand the willingness, tendency, and needs in CME. METHODS: A Discrete Choice Experiment (DCE) was developed based on literature review and semi-structured interviews with 4 general practitioners to identify key attributes of CME programs. The DCE survey was administered to 360 PHC physicians in Jiangsu Province, China, in August 2023, to elicit preferences for: training frequency, training time, training duration, training location, training content of basic medical services, and training content of basic public health services. A total of 281 valid responses were included after the quality control test, which involved checking completion time and consistency in repeated choice tasks. DCE data were analyzed using Mixed Logit, and Latent Class Models to explore preference heterogeneity and class membership. RESULTS: PHC physicians showed strong preference for CME training programs that were conducted during working hours on weekdays, once a year, at a local meeting place and training on health management of patients with multiple chronic diseases. Latent class analysis identified 2 preference classes, with half (51.2%) of the respondents focused only on training frequency and time while the rest considered training logistic arrangement as well as training content. These preferences could be explained by some observed characteristics of PHC physicians such as age and professional level. CONCLUSIONS: Overall, PHC physicians valued the convenience of participation in CME training programs and training on health management of patients with multiple chronic disease. Our findings can be used to inform the design of CME training programs for PHC physicians in China.