Objective: To investigate the level of knowledge-attitude-performance of surgical nurses for preventing pressure injury and its influence factors in Tianjin. Methods: In October 2019, 595 surgical nurses from Grade II and above hospitals in Tianjin were conveniently selected as the research objects, and a self-designed questionnaire on knowledge-attitude-performance for prevention of pressure injury was used to investigate. Results: The scores of nursing knowledge of pressure injury in this study were 61.80±14.00, in moderate level, with a total accuracy of 59.91% for knowledge dimension. The score of attitude dimension was 47.30±5.87, which was at a high level.The score of performance dimension was 24.50±3.59, in moderate level. Professional title was the influencing factor of knowledge; nursing experience with or without pressure injury was the influencing factor of attitude; and working years was the influencing factors of performance( P<0.005). Conclusion: The nurses exhibited a positive attitude towards pressure injury, but the level of knowledge and performance need to be improved. An effective improving measure is to carry out various forms of hierarchical training of pressure injury based on the theory of knowledge, attitude and performance.