Bronchial asthma and chronic obstructive pulmonary disease(COPD) both belong to chronic inflammatory airway diseases，sharing similarities in pathogenesis and treatment methods.For them，lung function can be restored by regulating qi and blood to promote the ventilation and purification of lung qi and exert normal physiological functions.Considering the relationship between physiological function of lungs and qi and blood，the common pathogenesis of bronchial asthma and COPD was explored.The basic pathogenesis of bronchial asthma is phlegm stagnation in the lungs，external pathogens triggering spasms，leading to the combination of phlegm and qi，and lung deficiency in descending and ventilating lung qi，sometimes accompanied by signs of blood stasis obstructing collaterals.The pathogenesis of COPD is primarily long-term lung deficiency，compounded by pathological products such as phlegm turbidity，fluid retention，and blood stasis，resulting in lung deficiency in descending and ventilating lung qi.The pathogenesis of asthenia in origin and sthenia in superficiality continues to progress with the course of disease.Furthermore，from the perspective of treating qi and blood simultaneously，the homotherapy of different diseases for of bronchial asthma and COPD，two chronic airway diseases，was discussed and the treatment concept of treating qi and blood simultaneously to unblock the airways was proposed.In combination with the use of Chinese patent medicine，the formulation characteristics and efficacy of Danlong Oral Liquid，guided by this pathogenesis，were analyzed to provide a theoretical basis for treating two respiratory diseases with different origins but similar treatments using Danlong Oral Liquid.