The invention relates to a Chinese herbal preparation for treating parasites in a pig and a preparation method thereof, belonging to the technical field of traditional Chinese medicines. The Chinese herbal preparation comprises the following main raw materials: Fructus Quisqualis, aloe, betel nut, morning glory seed, Anemone hupehensis, Alchornea davidii, Viburnum luzonicum, Glycosmis pentaphylla, Styrax obassia, Myrsine semiserrata, Ficus virens, Lysimachia laxa, Embelia vestita, Chihe, Chinese wistaria, Baliospermum micrxnthum, Digenea, Folium Lysimachia tengyuehensis, Stevia rebaudiana and licorice root. The bulk drugs of the Chinese herbal preparation are scientifically combined and exert synergistic effect, so the Chinese herbal preparation is capable of clearing heat, removing toxic matters, killing insects, eliminating stagnation, invigorating spleen, whetting the appetite, etc.; and the Chinese herbal preparation exerts good killing effect on imagoes in the pig, directly acts on infected parts, can kill eggs which have not grown into imagoes, is fast in action, short in treatment course, high in cure rate, free of toxic and side effect and worth promotion and application.