The invention belongs to the technical field of traditional Chinese medicines, and discloses an oral liquid for treating cold and a preparation method thereof. The oral liquid comprises the followingraw material components: Guangdong
achyranthes aspera, holly root and
momordica grosvenori. The Guangdong
achyranthes aspera, holly root and
momordica grosvenori are decocted with water and concentrated to prepare the oral liquid, wherein the
momordica grosvenori is combined with the
achyranthes aspera and holly root, so that release of effective components of the
momordica grosvenori can be effectively promoted; the effective component momordica glycosides in the
momordica grosvenori has obvious effects of relieving cough and reducing
sputum, and can increase the tracheal
excretion amount andsputum
excretion amount; and the components are reasonably combined and effectively cooperated, and the medicines are combined to achieve the effects, so that the oral liquid has the effects of clearing heat and moistening
lung, relieving
sore throat and easing up voice, reducing
phlegm, lubricating intestines and relaxing the bowels. In addition, the oral liquid is tasty and smooth in taste, does not have rough feeling and discomfort, is easily accepted by users, is reduced in cost, remarkably improves the economic benefit, is high in content of effective components, is safe, does not have toxic or
side effect, has wide application prospect, and is suitable for vigorous popularization.