The invention discloses peony face-moistening and nourishing essence and a preparation method thereof. The peony face-moistening and nourishing essence comprises the following raw materials in parts by weight: 65-80 parts of pure water, 2-14 parts of peony flower water, 2-11 parts of glycerol, 3-9 parts of butanediol, 0.05-0.3 parts of sodium hyaluronate, 0.5-1.5 parts of propylene glycol, 0.2-0.8 parts of 1, 2-exylene glycol, 0.01-0.09 parts of disodium EDTA, 0.1-0.7 parts of carbomer, 0.02-0.2 parts of xanthan gum, 0.1-0.5 parts of aminomethyl propanol, 0.001-0.006 parts of 3-o-ethyl ascorbic acid, 1-3 parts of polyethylene glycol-81, 1-2 parts of PEG/PPG-17/6 copolymer, 2-8 parts of nicotinamide, 0.6-1 part of betaine, 0.1-0.8 parts of dipotassium glycyrrhizinate, 0.2-0.8 parts of bis-PEG-15 methyl ether polydimethylsiloxane, 0.11-0.99 parts of p-hydroxyacetophenone, 0.23-0.78 parts of glycosylglycerol, 0.2-0.7 parts of panthenol, 0.001-0.003 parts of peony seed oil, 0.001-0.004 parts of magnolia sieboldii extract, 0.3-1.3 parts of a skin conditioner I, 0.2-1 part of a skin conditioner II, 0.1-0.8 parts of a skin conditioner III, 2-5 parts of a skin conditioner IV, 0.01-0.8 parts of a skin conditioner V and 0.02-0.07 parts of essence.