Objective: To evaluate the effect of airway nursing intervention on improving lung function in children with asthmatic bronchitis under the concept of humanistic care. Methods: A total of 60 children with asthmatic bronchitis who were treated in our hospital from March 2024 to March 2026 were selected. According to the differences in nursing plans, the children were divided into an experimental group (n = 30) and a control group (n = 30). Patients in the control group received routine airway care, while patients in the experimental group received a humanistic care intervention based on routine airway care. After 14 days, lung function, symptom disappearance time, efficacy, and parent satisfaction were compared between the two groups. Results: Before nursing, there was no statistically significant difference in FEV₁, FVC and PEF indicators between the two groups of patients (P > 0.05); after different nursing models were applied to the two groups of patients, the FEV₁, FVC and PEF indicators of the patients in the experimental group were significantly improved compared to the patients in the control group (P < 0.05). The clinical symptom disappearance time of patients in the experimental group was shorter than that of the control group, and the total hospitalization time was also shorter (P < 0.05). The total treatment effectiveness and parent satisfaction of patients in the experimental group were higher than those of the control group, and the incidence of complications was lower (P < 0.05). Conclusion: Using the concept of humanistic care on the basis of routine airway care can effectively improve the pulmonary function of children with asthmatic bronchitis, shorten the time when clinical symptoms disappear, improve the treatment effect, and also promote the establishment of a friendly nurse-patient relationship and reduce complications, which is worthy of promotion and application in clinical practice.