The invention belongs to the technical field of cosmetics, and particularly relates to whitening, nourishing and moisturizing water and a preparation method thereof. The whitening, nourishing and moisturizing water comprises water, propylene glycol, polyglycerol-10, hydroxyethylurea, glycine betaine, Carbomer, triethanolamine, polysorbate-20, sodium polyacrylate, polyethylene glycol-90M, sodium hyaluronate, PEG-40 hydrogenated castor oil, soybean germ extract, pea peptide, argan oil, cucumber primary liquid, biological elastin, CI 42090, essence and the like. The whitening, nourishing and moisturizing water is added with a plurality of natural active ingredients and can supplement skin moisture and simultaneously lock the moisture, so that the skin is tender and smooth; meanwhile, the moisturizing water is high in permeability and can effectively permeate the bottom layer of the skin, completely nourish the skin, improve dark and fatigue skin colour, and make the skin white.