PURPOSE: Semisulcospira libertina powder containing fermented pollen powder with enhanced antioxidation activity is provided to prevent skin aging caused by reactive oxygen and to recover fatigue.CONSTITUTION: A method for preparing Semisulcospira libertina powder for a cosmetic product comprises: a step of mixing pollen, purified water, and Bacillus subtilis and culturing at 40-50 deg. C for 40-50 hours and preparing a culture(S310) a step of inoculating Lactobacillus plantarum to the culture and culturing at 30-35 deg. C for 30-40 hours(S320) and a step of mixing the culture with concentrated Semisulcospira libertina powder(S330). A method for preparing the Semisulcospira libertina powder comprises: a step of mixing Semisulcospira libertina powder with medicinal herb powder containing three or more among an antler, cnidium, Asarium sieboldii, Angelica dahurica roots, Aconitum koreanum R. Raymond, Atactylodes macrocephala Koidzum, Apricot kernel, Asparagus cochinchinensis Merr., Polygonatum odoratum var. pluriflorum, Ampelopsis radix, and dried Poria cocos Wolf.(S330) and a step of freeze-drying and pulverizing the mixture(S340).COPYRIGHT KIPO 2013[Reference numerals] (AA) Manufacturing of semisulcospira libertina powder for cosmetics (S310) First step of pollen culturing (S320) Second step of pollen culturing (S330) Step of mixing powder (S340) Step of obtaining semisulcospira libertina powder for cosmetics본 발명에 의한 화장품용 다슬기 분말의 제조방법은, 화분(花粉), 정제수 및 바실러스 서브틸리스(Bacillus subtilis) 종균을 혼합하고, 40~50℃에서 40~50시간 배양하여 배양액을 얻는 단계, 상기 단계에서 얻은 배양액에 락토바실러스 플란타룸(Lactobacillus plantarum) 종균을 접종하여 30~35℃에서 30~40시간 배양하는 단계 및 상기 단계들을 거쳐 배양된 배양액에 농축된 다슬기 분말을 혼합하는 단계를 포함함으로써, 본 발명에 따르면, 항산화 기능이 우수한 다슬기를 화장품용으로 이용하는 방법을 제공한다.