This study focuses on the psychological capital of medical staff, including medical students, and aims to explore the current status of psychological capital among medical staff and its impact on career development through a literature review. A literature search was conducted using keywords such as "medical staff" and "psychological capital," as well as "medical students" and "psychological capital" in databases including WOS, PubMed, Scopus, and CNKI. A total of 106 articles were retrieved, and after applying exclusion criteria, 22 English articles and 37 Chinese articles were included in the review. The findings of this study indicate that the majority of the research reviewed was empirical in nature. Psychological capital was measured using psychological capital scales, and its relationship with other variables, such as job satisfaction and perceived organizational support, was examined. The results consistently suggest that psychological capital plays a critical role in the career development of medical staff, particularly in areas such as academic performance, employment, and social support. Moreover, it was observed that the Positive Psychological Capital Questionnaire (PPQ-26) was widely used in Chinese literature, while the Psychological Capital Questionnaire (PCQ-24) was more commonly used in English literature. These scales provided researchers with a valuable tool for measuring psychological capital among medical staff and assessing its impact on various aspects of their career development.