The present invention relates to a cosmetic composition using a coral reef (L), comprising: a pulverizing step (S10) of forming a needle-shaped pulverized product by pressurizing the coral reef (L) through physical pressure； A purifying step (S20) of purifying the impurities by containing the pulverized product obtained in the pulverizing step (S10) in an organic acid or inorganic acid solution for 20 to 28 hours； A first separating step (S30) of separating the impurities and the pulverized material by centrifugal rotation of the pulverized material purified in the purifying step (S20) to remove impurities； Impregnation step of impregnating RG2 in an amount of 60 to 70 wt% of RG2 in a mixed state of 30 to 40 wt% of the pulverized material having the impurities removed in the first separating step (S30) for 8 to 12 hours S40)； A second separating step (S50) of separating RG2, which has not been absorbed through the centrifugal rotation, of the pulverized material having absorbed RG2 in the impregnation step (S40), and removing the unabsorbed RG2； And 60 to 70 wt% of a chitosan solution formed by mixing 4 to 6 wt% of chitosan and 94 to 96 wt% of natural water on the pulverized product of the second separation step (S50) and 30 to 40 wt% of the pulverized product are mixed for 3 to 5 minutes And a coating step (S60) of forming a composition so as to prevent shattering of the absorbed RG2 by coating the outside of the pulverized product by shaking and impregnating the pulverized material for 8 to 12 hours, The first separating step S30 and the second separating step S50 centrifugally rotate at 8000-12000 rpm to remove impurities by separating the impurities and the pulverized material, And RG2 that is not absorbed is removed. Accordingly, the present invention provides an effect that the needle-shaped coral pulverized material and RG2 can be put into the skin for a long time according to the gradually melted state in the state of being embedded in the transdermal patch,
