Objective To explore the clinical efficacy of applying diaphragmatic deep breathing training as an adjunct to medication in the treatment of children with chronic persistent bronchial asthma. Methods Two hundred cases of children with chronic persistent bronchial asthma admitted to a hospital in Xianning from June 2018 to January 2020 were selected and divided into observation group and control groups using the random number table method

with 100 cases in each group. The children in the control group were given drug nebulizer inhalation treatment

and the children in the observation group were given diaphragmatic deep breathing training on the basis of the control group. The clinical efficacy

laboratory indexes

pulmonary function and family satisfaction of the children in the two groups were compared. Results The total effective rate of treatment for the children in the observation group was 95.00%

which was higher than that of the control group（79.00%）

and the difference was statistically significant（χ~2=11.317

P<0.05）. The serum immunoglobulin E（Ig E）

interleukin-4（IL-4） and tumor necrosis factor α（TNF-α） levels of the children in the two groups were lower than those before treatment

and the differences were statistically significant（P<0.05）. After treatment

FEV1

FVC and PEF of children in both groups were higher than before treatment

and they were significantly higher in the observation group than in the control group（P<0.05）. The satisfaction rate of the families of the children in the observation group was 94.00%

which was higher than that of the control group（77.00%）

and the difference was statistically significant（χ~2=11.656

P<0.05）. Conclusion Diaphragmatic deep breathing training is an effective adjunct to medication when treating children with chronic persistent bronchial asthma

which can effectively improve the body’s immunity

improve lung function

promote the relief of asthma symptoms and increase satisfaction.