To observe the effects of Lifei tabled on the stable phase of bronchial asthma, and to study the intervention effects on matrix metalloproteinases 9 (matrix metalloprotein-MMP of 9) concentration.Methods:A total of 60 patients with bronchial in the stable phase who treated in our hospital included into the study, were randomly divided into the control group and the observation group, with 30 cases in each group.Two groups of patients both received aminophylline tablets, 0.1 g/time, 3 times/day.The observation group had Lifei tables based on the treatment on the basic treatment, 2 tablets/times, 3 times/day.Both groups had 20 days for a course of treatment.After treatment, TCM syndrome integrals, pulmonary function, asthma indexes and the changes of serum concentration of MMP – 9 of two groups were compared.Results:1) The single and general TCM syndrome integrals decreased in the two groups of patients than before treatment (P<0.05), and the improvement of the observation group was more significantly (P<0.05); 2) The clinical total effective rate of the observation group was 90%, and 76.66% in the control group.The differences were with statistically significant (P<0.05); 3) The recovery time of patients with asthma in the observation group was shortened than the control group, with statistically significant differences (P<0.05); 4) forced expiratory volume (FEVl), peak expiratory flow (PEF) and 1st second forced expiratory lung forced vital capacity (FEVl/FVC) improved in the two groups after treatment (P<0.05), and the improved trend of the observation group was more obvious.The control group were with statistically significant differences (P<0.05); 5) Detected by ELISA test, MMP-9 levels decreased after treatment in the two groups of children, and the observation group had lower levels of MMP-9 after treatment compared with the control group (P<0.05).Conclusion:Based on conventional treatment, the Lifei tablets can further relieve state of bronchial asthma, with high safety, which is recommended in the clinical application.