The invention relates to a whitening composition and its preparation method and application. In terms of the mass percentage of the whitening composition, the whitening composition includes the following components: emblica extract: 0.01%-10%, soybean extract: 0.01%-20%, aloin: 0.01%-5% %, ascorbic acid ethyl ether: 0.3% to 5%, nicotinamide: 0.5% to 20%. The whitening composition of the present invention can achieve a balanced whitening effect, that is, it can comprehensively consider all aspects of skin whitening. Specifically, it can start from the process of melanin production, reduce melanin, block the transfer process of melanin, induce and block the protease-activated receptor-2 channel, reduce the phagocytosis of melanosomes by keratinocytes, reduce the transport of melanin, and prevent melanin from entering the cutin Layers and other aspects play a role.