This invention supplies a drug composition used to cure asthma, bronchitis, chronic obstructive pulmonary disease, and other respiratory diseases. The drug contains two active constituents: gingko-leaf extract and epinephrine receptor stimulator. In experiment we get a unexpected effect: the gingko-leaf extract engenders notable synergism effect withª‰-epinephrine receptor stimulator, and this has crucial meaning to clinical therapy of asthma, bronchitis, chronic obstructive pulmonary disease. Compound preparation types of aerosol, spray, powder aerosol, capsule, slow release capsule, soft capsule, common tablet, slow release tablet, disperse tablet, buccal tablet, droplet, and so on are not only propitious to quickly exert drug curative effect, but also are convenient to take.