Fuente: WIPO "tomato" The present invention provides a nutrient emulsion and a preparation method thereof. Specifically, the nutrient emulsion comprises egg yolk phospholipids, OPO-containing triglycerides, raw oil and water, wherein: the weight ratio of the egg yolk phospholipids to the OPO-containing triglycerides is in the range of 1:40 to 3:7; The average particle size D [4,3] of the oil droplet particles formed in the nutrient emulsion was in the range of 0.8-1.5 pm; And in the OPO-containing triglycerides, the proportion of 2-palmitic acid in the total palmitic acid is at least 52%, and the content of OPO is at least 40% by weight. According to the invention, the nutrient emulsion has good system stability and will not appear turbid or delaminate after long-term storage.