The present invention discloses a kind of skin-whitening cosmetic composition for containing extract of magnolia sieboldii as active constituent. Extract of magnolia sieboldii inhibits tyrosinase activity what and B16 cell has excellent effect, and contains extract of magnolia sieboldii as the cosmetic composition of active constituent with excellent skin lightening effects.本發明公開一種含有天女木蘭提取物作爲活性成分的皮膚增白化妝品組合物。天女木蘭提取物對於抑制酪氨酸酶活性和黑色素合成具有優異效果，並且含有天女木蘭提取物作爲活性成分的化妝品組合物具有優異的皮膚增白效果。
