Abstract: Objective To analyze the mediating effect of work-family conflict among nurses in the trauma intensive care unit of six grade-A tertiary general hospitals in Urumqi on the relationship between work connectivity behavior after-hour（WCBA） and job burnout,and to provide reference for reducing nurse job burnout. Methods A random sampling method was used to select 192 trauma intensive care nurses from 6 grade-A tertiary general hospitals in Urumqi from April to May 2024 as the research subjects. The WCBA scale,work-family conflict scale,and job burnout scale were used to investigate,and the data were analyzed. Results The WCBA score of trauma intensive care nurses was （44.68±7.36）points,the work-family conflict score was （58.62±12.39）points, and the job burnout score was （63.46±12.28）points. The influencing factors of WCBA,work-family conflict and occupational burnout of trauma intensive care nurses included age,professional title,years of work,average monthly income,number of night shifts per month,and marital status（all P<0.05）. The occupational burnout of trauma intensive care nurses was positively correlated with WCBA and work-family conflict（r=0.638,0.575,both P<0.01）,WCBA was positively correlated with work-family conflict（r=0.614,P<0.01）. Work-family conflict played a partial mediating effect between WCBA and occupational burnout of trauma intensive care nurses,with a mediating effect of 0.261,accounting for 45.31% of the total effect. Conclusion Work-family conflict played a partial mediating role between WCBA and occupational burnout of trauma intensive care nurses. Reducing the level of work-family conflict and WCBA can help reduce the level of occupational burnout of trauma intensive care nurses.

Key words: Trauma intensive care nurses, Job burnout, Work connectivity behavior after-hour（WCBA）, Work-family conflict, Mediating role