Guanlong Dingchuan Decoction was a self-formed prescription for clinical treatment of bronchial asthma in acute episode. The formula performs functions of expelling 'wind', Spasmolysis, promoting blood flow, deintoxication, eliminating phlegm and conquering wheezes. Thirty-eight bronchial asthma contracted patients in acute episode were treated with the formula and Thirty-seven cases were applied with the conventional therapy of opening the inhibited lung and lowering adverse-rising qi for comparison. Results showed treatment group were remarkably better than the control group (P<0.05 or P<0.01) in the lung function test, asthma remission rate, cardinal symptom physical sign efficacy time, etc. It had been suggested that the conventional therapy plus Guanlong Dingchuan decoction could significantly enhance clinical curative effect.