The invention relates to a duck essence and a preparation method thereof. The duck essence are prepared from the following ingredients: furanone, ethyl maltol, bisthioether, acetic acid, 2-methyl-3-furanthiol, sulfurol, 4-methyl-4-sulfydryl-pentanone, 3-methylthiopropanol, 2,4-decadienal, 2-acetylthiazole, hexanoic acid, 2,3,5-trimethyl pyrazine, butyric acid, octylene alcohol, hexanal, furfural,furfuryl alcohol, benzaldehyde, heptanol, anisic aldehyde, 3-methylthiopropanal, furfurylmercaptan, 2,4-nonadienaldehyde, trans,trans-2,4-Undecadien-1-al, indole, octanoic acid, 4-methyloctanoic acidand salad oil. The duck essence disclosed by the invention has the advantage of natural and pure aroma and is harmonious, long-lasting, strong and mellow. The invention also provides a preparation method for the duck essence. According to the preparation method for the duck essence, the duck essence with vivid duck taste and strong aroma can be prepared. In addition, the duck essence has the advantage of natural and pure aroma and is harmonious, long-lasting, strong and mellow, so that the quality and the taste of the duck product can be obviously improved, and the preparation method has a good application prospect.