The invention discloses a skin care agent capable of removing freckles, whitening, preventing wrinkles, moisturizing and resisting allergy and ageing, and a preparation method of the skin care agent. The skin care agent is characterized by comprising the following raw materials in parts by weight: 0.1-10 parts of an aloe extract, 0.1-5 parts of vitamin A, 0.1-10 parts of vitamin D, 0.1-0.5 part of hyaluronic acid, 0.1-5 parts of a swertia mileensis extract, 0.1-2 parts of alpha-lipoic acid, 0.1-5 parts of a licorice extract, 0.1-3 parts of a green tea extract, 0.1-2 parts of a fructus viticis extract and 0.1-3 parts of a grape seed extract. The preparation method comprises the following steps of: respectively adding the substances into deionized water at 75-85 DEG C, and maintaining the constant temperature for 20min; cooling the water to 50 DEG C, and adding 1-2 parts of Twain-200 into the cooled product; and stirring and cooling the solution to obtain the skin care agent. The skin care agent has the beneficial effects of being reasonably prepared from the natural extracts, being capable of permeating into a corium layer so as to accelerate metabolism, repair damaged skin and recover and maintain the elasticity of the skin, and being capable of rapidly achieving the special effects of removing freckles, whitening, preventing wrinkles, moisturizing and resisting allergy and ageing.