The invention discloses a soluble breast enlargement microneedle which comprises a needle tip (1), wherein the needle tip (1) comprises effective components. The effective components include the following components in parts by weight: 14 to 20 parts of a walnut oil extract, 10 to 12 parts of sunflower seed oil, 10 to 13 parts of a radix puerariae extract, 16 to 22 parts of a butanediol extract, 8to 12 parts of a fructus broussonetiae extract, 10 to 13 parts of a crocus sativus extract, 8 to 11 parts of a herba cistanche extract, 4 to 6 parts of a pine needle extract, 5 to 9 parts of a cyrtomium fortune extract, 7 to 15 parts of a rose extract, 8 to 16 parts of a cananga odorata extract, 5 to 12 parts of a lemongrass extract, 5 to 15 parts of a longan extract, 5 to 7 parts of a radix paeoniae alba extract, 4 to 9 parts of a fructus schisandrae chinensis extract and 4 to 9 parts of an extract of flower of franchet peashrub. The microneedle is obvious in breast enlargement effect.