Results: 28.9% of nurses showed signs of post-traumatic stress disorder. The results showed that nurses were directly involved in epidemic prevention (OR=1.77; 95% CI: 1.14 - 2.16); had contact with COVID-19 patient (OR=1.59; 95% CI: 1.13 - 2.72); Had working time≥48 h / week (OR=2.78; 95% CI: 1.16 - 4.8); having stress symptoms (OR=1.76; 95% CI: 1.05 - 3.25) and having depression symptoms (OR=2.28; 95% CI: 1.09 - 3.8) were likely to have higher risk of psychological trauma than other nurses.