Objective To investigate the current status of research knowledge-sharing intentions among nurses holding a master′s degree in China and analyze the influencing factors, and to support the enhancement of clinical nurses′ research capacity. Methods From October to December 2023, a convenience sample of 315 nurses holding a master′s degree from 54 tertiary hospitals across 19 provinces in China was surveyed using a general information questionnaire, the Knowledge-Sharing Intention Scale, the Research Attainment Scale, and the Research Self-Efficacy Scale. Multiple linear regression analysis was used to identify the influencing factors. Results The average score for research knowledge-sharing intentions among these nurses was （27.61±5.94） points. Significant influencing factors included gender, marital status, years of work experience, number of published articles, research attainment, and research self-efficacy (all P<0.05). Conclusion Nurses holding a master′s degree demonstrated a moderate to high level of research knowledge-sharing intentions, with higher levels among females, married nurses, those with longer work experience, those who had published more articles, and those with higher research attainment and self-efficacy. Nursing managers should encourage knowledge-sharing and leadership, aiming to improve research capacity across nursing staff.