Objective：To analyze the drug using regularity and features in treating cough variant asthma through literature mining.Methods：Systematically retrieved the literature about Chinese medicine in treating cough variant asthma in experience，case report and clinical research，analyzed the prescriptions and application of drugs in terms of frequency analysis，and dissected the clinical experience features and drug using regularity by adopting improved mutual information method.Results：The selected 112 Chinese herbs were analyzed so as to determine the frequency of use of the drugs.The highest frequency of drug use in treating cough variant asthma was diaphoretics drug，followed by cough-relieving and anti-asthmatic drugs.The other drugs with higher frequency of use were ephedra，dried tangerine peel，bupleurum，pinellia ternate and cicada slough.Through the analysis of association rules among drugs，a core combination of ephedra，pinellia ternate and cicada slough evolved.Conclusion：In the clinical treatment of cough variant asthma，under the premise of following Chinese medicine syndrome differentiation and treatment，attention should be paid to the application of wind-sparing and lung-promoting medicine and phlegm-dissipating and cough-and asthma-relieving medicine.If patients are sick due to the volatile wind which is deeply buried in the lung collaterals so that the disease is stubbornly difficult to remove，they should be appropriately given insecticidal anti wind medicine.Regardless of the new diseases or the diseases lasting for a long period of time，they should all be appropriately given drugs of regulating the center and benefiting qi or activating blood.