The invention relates to a stomach-calming foaming paste used for treating chronic atrophic gastritis and a preparation method thereof. The preparation method comprises the following steps of: washing unprocessed rhizoma pinelliae, evodia rutaecarpa, unprocessed rhizoma arisaematis, radix linderae and cantharis respectively, drying, pulverizing, sieving by a sieve of 100 meshes, then sterilizing together with fresh ginger juice by ultraviolet rays, mixing proportionally, preparing into a paste shape, preparing a medicinal paste and afterwards treating the chronic atrophic gastritis by adopting a foaming therapy method after directly applying the medicinal paste to the Shu point of the spleen and the Shu point of the stomach of a patient. The stomach-calming foaming paste can achieve a local point stimulation therapeutic action by the application of a traditional Chinese medicine foaming technology and can also enable the active factors of a medicine to directly reach a focus by the infiltration of the skin so as to act as the functions of activating traditional Chinese medicines by a plurality of target spots and participating in the treatment of the focus by a plurality of systems. Clinical test shows that the effect is obvious.