The invention belongs to the field of traditional Chinese medicine physique healthcare, and particularly relates to foot soaking medicine for treating phlegmatic hygrosis. The foot soaking medicine for treating phlegmatic hygrosis is mainly prepared from, by weight, 5-20 parts of roots of fangji, 3-25 parts of radix angelicae pubescentis, 3-15 parts of notopterygium roots, 3-15 parts of agastache rugosus, 4-20 parts of arisaema cum bile and 5-25 parts of rhizoma atractylodis. Meanwhile, the invention provides a preparation method and application of the foot soaking medicine for treating phlegmatic hygrosis. The foot soaking medicine for treating phlegmatic hygrosis has the advantages that the foot soaking medicine for treating phlegmatic hygrosis is reasonable in formulation, all component raw materials are matched, and the better curative effect can be achieved while phlegmatic hygrosis is treated. The foot soaking medicine prepared through the preparation method has the advantages of being easy and convenient to prepare, high in content of effective ingredients, even, low in preparation cost and the like.