目的 了解参与营养支持专科护士培训后的护士工作投入水平现状，并探究其角色冲突和角色模糊对工作投入水平的影响，为医院护理人力资源的管理提供参考。方法 采用一般资料调查表、角色冲突和角色模糊量表、专科护士工作投入量表对河南省完成营养支持专科护士培训的护士进行问卷调查。结果 440名护士角色冲突维度得分为（33.05±7.24）分，角色模糊得分为（21.69±5.57）分，工作投入水平得分为（108.22±36.82）分。相关性分析结果显示，护士角色冲突、角色模糊与工作投入呈负相关（r=-0.556，r=-0.376，P<0.001）。分层回归分析结果显示，角色模糊和角色冲突对护士工作投入水平具有负性影响，可解释总变异的20.6%。结论 参与营养支持专科护士培训后的护士工作投入处于中等水平，管理者应进一步明确完成营养支持专科护士培训的护士临床角色与分工，消除其角色冲突和角色模糊，进一步推动我国营养支持护理的发展。

Objective To understand the current situation of job engagement of nurses who participated in nutrition support specialist nurse training，and to explore the impact of role conflict and role ambiguity on job involvement，so as to provide reference for the management of nurses in hospitals. Methods General data questionnaire，Nurse’s Role Conflict and Ambiguity Scale，and Specialty Nurse Work Engagement Scale were used to investigate 440 nurses who participated in nutrition support specialist nurse training in Henan province. Results The scores of role conflict dimension，role ambiguity and job engagement were（33.05±7.24），（21.69±5.57） and （108.22±36.82），respectively. The results of correlation analysis showed that role conflict，role ambiguity and job engagement were negatively correlated（r=-0.556，r=-0.376，P<0.001）. The results of hierarchical regression analysis showed that role ambiguity and role conflict had a negative effect on the job involvement level of nurses who participated in nutrition support specialist nurse training，which could explain 20.6% of the total variation. Conclusion The job engagement of nurses who participated in nutrition support specialist nurse training is at a moderate level，and managers should further clarify the clinical roles and division of labor of nutrition support specialist nurses，eliminate their role conflicts and ambiguity，and promote the development of nutrition support specialist nurses in China.