The invention discloses a hydrating facial mask, belonging to the technical field of beauty masks. The hydrating facial mask comprising 85-90wt% of deionized water, 1-2wt% of sorbitol, 2-3wt% of hydrolyzed collagen protein, 2-3wt% of vitamin E, 1-2wt% of potassium alginate, 2-3 wt% of hyaluronic acid, 1-2wt% of diazolidinyl urea, and 1-2 wt% of mulberry root extract as main ingredients. The hydrating facial mask is prepared by mixing 85-90wt% of deionized water, 2-3wt% of hydrolyzed collagen protein, 2-3 wt% of hyaluronic acid, 2-3wt% of vitamin E, and 1-2 wt% of mulberry root extract under stirring and heating up to 55-65 DEG C, then cooling to 45 DEG C with stirring, adding 1-2wt% of diazolidinyl urea, 1-2wt% of sorbitol, and1-2wt% of potassium alginate and cooling to a room temperature, and finally conducting sterilization for about 2 h under ultraviolet rays with a wavelength of 200-280 nm. The hydrating facial mask disclosed herein can effectively supplement essential moisture and nutrition of skins, has the effects of smoothing the skin, moistening the skin, balancing the acid-base value of the skin, preserving moisture, improving dull and yellow and dehydrated skin, and preventing the skin drying, and is non-irritating.