The invention discloses anti-allergy and repair essence and a preparation method thereof, and aims to provide essence which is resistant to strong charge, makes skin moist, realizes anti-allergy and repair, and is safe and free of irritation. According to the technical scheme adopted by the invention, the anti-allergy and repair essence is prepared from the following components in percentage by weight: 0.35-0.5% of radix astragali membranaci extract, 0.1-0.5% of bighead atractylodes rhizome extract, 1.7-2.5% of tremella fruiting body extract, 0.1-5% of lactobacillus ferment lysate, 0.5-1% of nicotinamide, 0.1-0.15% of sodium hyaluronate, 1.0-2.5% of ceramide, 0.1-0.3% of allantoin, 5.0-8.0% of 1,3-butanediol, 2.0-5.0% of glycerinum, 1.5-2.3% of polyglycerol-10, 1-2% of glycerol polyether,1-5% of methyl gluceth-20, 1.8-2.5% of glyceryl polyacrylate / acrylic copolymer, 0.1-0.25% of carbomer, 0.2-0.35% of p-hydroxyacetophenone, 0.3-0.6% of octyl hydroxamic acid, 0.1-0.25% of triethanolamine and the balance of deionized water. The anti-allergy and repair essence belongs to the technical field of comestics.