The invention discloses breast enlarging essential oil capable of improving microcirculation and enhancing skin elasticity. The breast enlarging essential oil is prepared from the following materials in parts by weight: 15-20 parts of geranium, 17-19 parts of cypress, 10-15 parts of grape seeds, 13-15 parts of pueraria mirifica extract, 6-8 parts of oat beta glucan, 2-4 parts of sturgeon caviar extract, 3-5 parts of cornu cervi pantotrichum extract, 6-8 parts of angelica sinensis, 7-9 parts of semen cuscutae, 3-5 parts of codonopsis pilosula, 11-13 parts of tripeptide, 8-10 parts of tetrapeptide, 7-9 parts of hyaluronic acid, 12-14 parts of vitamin E, 21-25 parts of butanediol and 7-9 parts of deionized water; the essential oil can quickly permeate into chest skin, moisten the chest skin, supplement nutrients required by thymic cells, improve skin elasticity, promote blood circulation, improve circulation, dredge channels, activate mammary gland cells, redevelop mammary gland tissues and realize compactness and straightness of the chest, and has the advantages of remarkable effect, safety, no side effect and no rebound.