摘要：This study aims to explore the causes of medical staff turnover in county public hospitals from the perspective of developmental psychology and put forward effective countermeasures. Through qualitative research method, a semi-structured in-depth interview was conducted with 23 medical staff in Liannan County Hospital to analyze the current situation and influencing factors of their loss. The study found that difficult working environment, lack of career development opportunities, poor sociocultural adaptation and inconsistency between personal values and organizational goals were the main reasons leading to the turnover of medical staff. In response to these problems, the research puts forward countermeasures and suggestions to improve the working environment, provide career development platform, strengthen social and cultural support, and promote the integration of individual values with organizational goals. The results of this study provide a new perspective for understanding and solving the problem of medical staff turnover in county public hospitals, and provide a reference for relevant policy formulation and hospital management practice.