An aspect of the present disclosure relates to a composition for improving respiratory health exposed to particulate matter, which contains a green tea extract, a green tea polysaccharide and a green tea flavonol as active ingredients. The composition provided in an aspect of the present disclosure can improve respiratory health damaged by exposure to particulate matter by enhancing the effect of preventing adsorption of particulate matter to bronchial epithelial cells and activating the cilia of bronchial epithelial cells. The composition provided in an aspect of the present disclosure may decrease blood heavy metal level.