PURPOSE: A cosmetic composition containing natural mixture extract for skin whitening is provided to suppress tyrosinase synthesis and melanogenesis. CONSTITUTION: A cosmetic composition for skin whitening contains 0.5-2 weight parts of black garlic extract and 0.5-2 weight parts of Moutan Radicis Cortex based on 1 weight part of pure extract as an active ingredient. A method for obtaining the herb mixture extract comprises: a step of mixing 8.7-12.7 weight parts of distilled water with 1 weight part of dried herb mixture； a step of performing shaking incubation at 50-70°；C for 20-28 hours； a step of centrifuging at 5000-7000rpm for 50-70 minutes； and a step of filtering and freeze-drying.본 발명은 보이차 추출물 1 중량부에 대해 흑마늘 추출물 0.5~2 중량부 및 목단피 추출물 0.5~2 중량부를 혼합한 혼합추출물을 유효성분으로 함유하는 것을 특징으로 하는 미백용 화장료 조성물에 관한 것으로, 티로시나제의 활성을 억제하면서 세포내 멜라닌의 생성을 억제하는 천연소재 혼합추출물을 유효성분으로 함유함으로써 실질적인 미백효과를 발휘한다.
