The invention discloses a hyaluronic acid moisturizing facial mask and a preparation method thereof. The facial mask is prepared from the following raw materials: distilled water, glycerol, propyleneglycol, bio-saccharide gum-1, snail secreta filtrate, glycerol polymethacrylate, a PVM / MA copolymer, rose water, a perilla leaf extract, a chrysanthellum indicum extract, a glycyrrhiza glabra extract,a centella extract, an althaea rosa extract, a dandelion extract, a notoginseng extract, 1,2-hexanediol, p-hydroxyacetophenone, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerol, PPG-10 methyl glucose ether, phosphatidyl choline, benzoyl 3, sodium stearoyl glutamate, octanoyl hydroxamic acid, sodium hyaluronate, carbomer, hydrolyzed scleroglucan gum, methyl paraben, phenoxyethanol, ethylhexyl glycerol,sodium hydroxide and propyl paraben. The preparation method of the hyaluronic acid moisturizing facial mask comprises the following steps: S1, preparing a matrix A; S2, executing emulsification to prepare a matrix B; S3, preparing a matrix C and dispersing the matrix C and the matrix A to obtain a matrix D; S4, executing homogenization; S5, carrying out microwave sterilization to obtain the facialmask.