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Objective To explore the status of nurses′ knowledge, attitude and practices regarding insulin pump treatment, and their association and influencing factors. Methods　This study was a cross-sectional study. It was based on the stratified sampling method with registered clinical nurses from Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology as research subject from June to July 2021. The research tools consisted of 19-item, independently created questionnaires that assess nurses′ knowledge, attitudes, and practices related to the use of insulin pumps. The results ranged from 9 to 55 points. The variance analysis or independent sample t test was used to compare the difference in scores between different nurses for their knowledge, attitudes, and practices regarding insulin pump treatment. At the same time, the total score of insulin pump treatment was taken as the dependent variable, and the statistically significant variables in the single-factor analysis results were included. Stepwise multiple linear regression analysis was used to examine the mediating role of attitude towards insulin pump treatment between knowledge and behavior. Results　One thousand eight hundred and forty-four valid questionnaires were collected. The nurses had a low awareness rate of the complete identification standard of insulin pump treatment (10.57%), drug characteristics in insulin pump (51.19%), methods to handle the alarm of insulin pump low battery/low volume (52.60%), and the time to disconnect the insulin pump from the body (59.44%). There were statistically significant differences between single-item scores and total scores for job title, manager′s cognition of insulin pumps, different specialties, and annual time spent attending insulin pump training and operation (P<0.05). The total score was (45.8±7.6), of which the total scores of knowledges, belief, and behavior were (6.7±1.6), (19.5±1.5) and (19.6±6.0), respectively. The score rate of knowledge, belief, and behavior was 67.0%, 97.5% and 78.4%, respectively. The independent factors influencing the total score of nurses′ knowledge, attitudes and practices related to insulin pump treatment were time spent attending insulin pump training, time spent using an insulin pump operation, pediatric department and emergency critical care department (with regression coefficients of 1.945, 1.782, -8.207, and -5.444, respectively, and mean P<0.001). Nurses′ knowledge of insulin pump treatment can indirectly and positively influence their practice through their attitudes, but direct and positive influenc was the main way. Conclusions　Nurses′ knowledge and practices of insulin pump treatment need to be improved. There is a positive relationship between their knowledge, attitude and practice of the insulin pump treatment. Furthermore, their knowledge of insulin pump treatment can influence their practices through their attitudes, with direct and positive influence being the most important way. [ABSTRACT FROM AUTHOR]