The invention relates to a whitening and moisturizing special-effect essence and a preparation method thereof. The raw materials are composed of the following proportions in parts by weight: 50-60 parts of butanediol, 5-10 parts of glycerin, and 6-60 parts of North African cedar bark extract 8 parts, 5-9 parts of ginseng extract, 4-6 parts of ginkgo extract, 8-13 parts of hyaluronic acid, 7-10 parts of collagen, 2-3 parts of betaine, 4-5 parts of centella asiatica extract, knotweed 4-5 parts of root extract, 3-5 parts of licorice root extract, 2-4 parts of astragalus root extract, 3-5 parts of VP copolymer, 4-6 parts of snow lotus flower extract, 2 parts of blueberry pulp extract ‑4 parts, 2‑3 parts of sodium hyaluronate, 3‑5 parts of dipotassium glycyrrhizinate, 2‑5 parts of ethyl cellulose, 2‑4 parts of xanthan gum, 3‑5 parts of EDTA, 2‑6 parts of carnosine 3-6 parts of anteline, 3-4 parts of chlorphenesin, 4-6 parts of castor oil, 50-100 parts of deionized water. The invention helps the skin to absorb water molecules, has super-strong heat preservation, is refreshing and non-greasy, deeply replenishes water, revitalizes the water-making function of the skin, brightens the skin color, whitens and moisturizes, delays aging and has a long service life.