摘 要：甘草是常用中药，药理作用广泛。现代研究发现甘草及其提取物具有镇咳、祛痰、平喘、肺保护及抗呼吸道病原体等作用，甘草酸、甘草次酸及甘草的黄酮类化合物是甘草对呼吸系统药理作用的活性成分。

Abstract: Licorice is a common kind of TCM materials with wide pharmacological effects．According to modern research，licorice and its extracts can stop cough，expel phlegm，relieve asthma，protect lung and resist respiratory pathogens．Glycyrrhizic acid，glycyrrhetinic acid and flavonoids are the main pharmacologically active components on respiratory system．