Objective: This study aims to identify and define the ideal professional competencies of Clinical Research Nurses (CRNs) in China, focusing on the essential knowledge, skills, and personal attributes required for effective practice in clinical trials. Methods: Interviews were conducted with CRNs, Nurse Managers (NMs), Principal Investigators (PIs), SubInvestigators (SIs), Clinical Research Coordinators (CRCs), Clinical Research Associates (CRAs), and subjects. Thematic analysis was performed using Colaizzi's seven-step method to analyze interview data and identify key competencies. Results: The study identified four primary themes that characterize the ideal CRN profile: (1) theoretical knowledge ability, (2) practical technical ability, (3) professional quality and ability, and (4) personal traits. A total of 21 specific indicators were delineated, reflecting the diverse expectations of various stakeholders in clinical trials. Conclusions: The findings highlight the multifaceted nature of CRN competencies, emphasizing the importance of comprehensive training programs tailored to the needs of CRNs. This study provides a foundational framework for enhancing CRN training and professional development in China.