The invention discloses a navel paste for treating mammary gland hyperplasia diseases. The navel paste is prepared by processed polygala root, Chinese angelica, curcuma zedoary, frankincense, rhizoma cyperi, radix angelicae, schizonepeta spike, costus root, mint, jasmine, trichosanthes kirilowii Maxim, Astragalus mongholicus, radix curcumae, peach kernel, root of red-rooted salvia, sangusis draconis, borneol and muskone. The preparation method comprises the following steps of grinding all the medicines, except from the muskone and the borneol, into fine power of 80-150 meshes, adding the ground fine muskone and the borneol after honey preparing, and then evenly mixing in the paste subjected to honey preparing, and preparing the externally applied navel paste with each packet of 5-8g. The navel paste mainly aims at etiology and pathogenesis of the mammary gland hyperplasia diseases; the guiding ideologies of the treatment plan are based on activating blood circulation and removing blood stasis, resolving hard lumps, removing stasis and detumescence, and eliminating stagnation to stop pain. The selected medicines are natural plant medicines, and have the functions of eliminating breast lumps and enhancing the resistance; and the navel paste is exact in curative effect, fast in effect, free of toxic and side effect, high in cure rate through clinical verification, reasonable in used medicines and scientific in compatibility.