Granules for preventing and treating bronchial asthma and preparation method thereof

The invention discloses granules for preventing and treating bronchial asthma. The granules for preventing and treating bronchial asthma comprises, by mass, 25-30 parts of radix astragali, 7-12 parts of white atractylodes rhizome, 8-12 parts of Chinese parsnip roots, 5-10 parts of cassia twig, 5-10 parts of white paeony roots, 5-10 parts of fresh gingers, 5-10 parts of Chinese dates, 5-10 parts of liquorice, 5-10 parts of common curculigo rhizome and 8-12 parts of epimedium herb. A preparation method comprises the steps of decocting traditional Chinese medicines, performing concentration, alcohol precipitation and drying to obtain dry powder, mixing the dry powder with dextrin and then adding acesulfame to prepare granules, namely obtaining a finished product. The granules can tonify qi, warm yang, protect stomach, improve a defense function and immune adjustment capacity of the respiratory tract, relieve tract inflammation, reduce tract reactivity and decrease or control repeated asthma attack. The preparation method of the granules adopts two-time decoction, effective ingredients of the medicines can be effectively extracted, and the prepared granules are convenient to use.