Objective To understand the current situation of training migration of critical care specialist nurses and its influencing factors in Fujian Province，and to provide a reference for the adjustment of the training program and the improvement of the management program of critical care nurses in the future. Methods From December 2023 to March 2024，a descriptive qualitative research method was used to conduct online in-depth semi-structured interviews with 24 critical care specialist nurses in Fujian Province，and the interview data were organized and refined for analysis using Colaizzi’s 7-step method. Results The current situation and influencing factors of the training migration of critical care specialist nurses have been distilled into 4 themes and 14 sub-themes，including self-awareness and debugging（self-driven participation in training，precise positioning of training needs，and assessment of the adaptability of learning environments）， analysis of training effectiveness（optimization of learning experience by curriculum，reasonable guidance by instructors，and regularization of training contents），transformation and application of training outcome （refinement of clinical skills，stimulation of internal driving force，improvement and enhancement of nursing service quality，barriers of training-to-practice transfer），insight into social support mechanisms（creation of a growth environment for critical care specialist nurses，team support motivation，organizational synergy，obstacles to career attraction）. Conclusion Critical care specialist nurses are affected by a variety of factors in the process of training migration，the training model need to optimized continuously in the future，and the relevant healthcare institutions should also continue to improve the policy support for critical care specialist nurses after training，in order to maximize the promotion of training migration and further guide the positive career trajectory of critical care specialist nurses.