Objective: To investigate the current status of knowledge hiding behavior of clinical nurses and its influencing factors. Methods: A total of 264 clinical nurses were recruited from two Class A tertiary hospitals in Putian from April 2021 to May 2021，and they were investigated by general information questionnaire, knowledge hiding questionnaire and organizational justice scale. Multiple linear regression was used to identify influencing factors of the knowledge hiding behavior in clinical nurses. Results: The total score of knowledge hiding questionnaire was 21.01±11.71，and the scores of each dimension were including active hiding(11.35±6.78), passive hiding(9.66±5.23). Multiple linear regression analysis showed that working years, employment form and interpersonal justice were the main influencing factors of knowledge hiding behavior in nurses( P<0.05)，and explained 23.3% of the total variance. Conclusion: The knowledge hiding behavior of clinical nurses were at a medium high level. Nursing managers should pay attention to junior nurses, actively build a knowledge sharing platform, formulate corresponding incentive policies, and create a good atmosphere for knowledge transfer, so as to reduce the occurrence of knowledge hiding behavior.