Objective To investigate the characteristics of post-traumatic growth in psychiatric nurses who experienced violence in the workplace and analyze its influencing factors. Methods A questionnaire survey was conducted among psychiatric nurses who experienced workplace violence in three hospitals in He'nan Province from May to August in 2020. General information questionnaire， post traumatic growth scale， nurses' self-efficacy scale were applied in the investigation. Results A total of 50 psychiatric care workers who had experienced workplace violence in the last three months participated in the survey. The total score of post-traumatic growth was（ 55.24±21.95）. The scores of each dimension are as follow： relationship with others （7.44±3.27）， life perception（ 19.54±7.46）， personal strength（ 9.30±4.17）， self-transformation（ 10.20±3.39）， new possibility（ 8.76±3.65）. The score of nurses' self-efficacy scale was（ 23.14±7.43）. The results of multiple linear regression analysis showed that self-efficacy， working years and professional title were the influencing factors for the post-traumatic growth of the psychiatric nurses who had experienced workplace violence（ R2=0.845， F=39.007，P ＜ 0.001）， which accounted for 84.50% of the total variation. Conclusions The post-traumatic growth of psychiatric nurses who experienced workplace violence was at the middle level. Improving nurses' selfefficacy can promote post-traumatic growth. The level of post-traumatic growth of nurses with long working years and high professional titles was higher in the early stage of trauma（ within 3 months）. Nursing managers should take various measures to improve the post-traumatic growth of nursing staff and help them recover from the trauma.