To analyze the intervention effects of modified Xiaoqinglong Decoction on the elderly patients with external cold and internal fluid retention syndrome of bronchial asthma.Methods:A total of 80 cases of bronchial asthma with external cold and internal fluid retention syndrome in our hospital from March 2015 to February 2017 were selected as the research objects,and divided into control group and observation group by random number table,with 40 cases in each group.The control group was treated with routine treatment of Western medicine and Aminophylline Tablets,while the observation group was treated with modified Xiaoqinglong Decoction on the basis of Western medicine.The clinical effects of patients before and after treatment,the integral changes of clinical symptoms,asthma control questionnaire(ACQ6)score,asthma quality of life questionnaire(AQLQMAEKS)score,lung function and other indicators were observed.The standard of curative effects referred to The guiding principles of clinical research of new drugs of Chinese medicine.Results:The total effective rate of the observation group was 95%,and the total effective rate of the control group was 72.50%.The difference between the 2 groups was statistically significant(P<0.05).The difference in TCM syndrome integral and individual symptoms(cough,phlegm,wheezing,shortness of breath)of the observation group before and after treatment was significantly higher than the control group(P<0.05).Each individual symptom scores and the total score of TCM syndrome decreased significantly after treatment.The score of AQCQ6 and AQLQMARKS in the observation group was significantly lower than that of the control group(P<0.05).The forced expiratory volume In 1 s(FEV1),FEV1/forced vital capacity ratio(FEV1/FVC),maximal midexpiratory mean velocity(MMEF)of the observation group after treatment showed an upward trend.FEV1,FEV1/FVC and MMEF of the observation group after treatment were significantly higher than that of control group(P<0.05).Conclusion:The effects of modified Xiaoqinglong Decoction in the treatment of elderly patients with external cold and internal fluid retention syndrome of bronchial asthma is certain,which can significantly improve the TCM clinical symptoms and lung function of patients.