The purpose of this project is to explore the impact of health education based on IMCHB model on the self-management ability of school-age children with type 1 diabetes. For this reason, we selected 90 school-age children with type 1 diabetes who were hospitalized in a tertiary A hospital in Dezhou City from January 2023 to August 2023 as the research objects, and randomly divided them into a control group and a test group. The control group received routine health education, including dietary guidance, medication guidance, disease observation, and expanded hospitalization guidance. The experimental group received IMCHB health education intervention on the basis of the control group, with a duration of 3 months. Compare the fasting blood glucose, 2-hour postprandial blood glucose levels, glycated hemoglobin values, and self-management behavior scale (SDSCA) scores between the two groups before and after intervention. The experimental results showed that after intervention, the fasting blood glucose and 2-hour postprandial blood glucose values in the experimental group were lower than those in the control group (P<0.05), and the difference was statistically significant; The glycated hemoglobin in the experimental group was lower than that in the control group (P<0.05); The SDSCA score of the experimental group was significantly higher than that of the control group, and the difference was statistically significant (P<0.05). Thus, it is concluded that the nursing intervention of health behavior interaction mode can effectively control the fasting blood glucose and 2-hour postprandial blood glucose of school-age children with type 1 diabetes, improve their self-management ability in the treatment process, and reduce and delay the occurrence of diabetes complications.