Objective To explore the growth of psychiatric nurses after experiencing traumatic event during the night shifts,in order to provide targeted interventions and guidance for them at different stages,and to provide training directions for newly graduated nurses by managers or interveners. Methods 12 psychiatric nurses who experienced traumatic events during the night shifts in a tertiary hospital in Guangdong Province from March to July 2020 were interviewed by grounded theory method. Based on Strauss and Corbin grounded theories,open login,axial login and selective login were conducted for continuous comparison and analysis for data. Results This study found that psychiatric nurses experienced 3 different stages after experiencing night shift traumatic event,including stress period,adjustment period,and growth period. Conclusion The growth of psychiatric nurses after night shift traumatic event is a dynamic process. Managers or interveners can carry out targeted interventions and guidance according to different stages,and encourage them to prepare relevant knowledge and skills in advance during the early training of newly graduated nurses.