Disclosed is an application of chlorogenic acid in preparing medicines for treating pulmonary blastoma, and the present invention specifically relates to an application of chlorogenic acid in preparing medicines for preventing and treating pulmonary blastoma by using P53, PI3K-AKT, and MAPK paths. Further disclosed is a preparation for treating pulmonary blastoma. The preparation comprises chlorogenic acid and pharmaceutically acceptable excipients or auxiliary materials.
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