The invention discloses a nourishing, moisturizing and cleansing milk and a preparation method thereof. The nourishing, moisturizing and cleansing milk comprises the following components by mass: 35%to 45% of enzymolyzed ultrafiltrated rice-washing water, 15% to 25% of an amino acid surfactant, 35% to 45% of polyol, 1% to 3% of a thickening agent, 0.5% to 2% of triethanolamine, 0.5% to 5% of plant essential oil and 0.1% to 0.2% of disodium EDTA. The preparation method comprises the following steps: uniformly mixing the polyol, the thickening agent and the enzymolyzed ultrafiltrated rice-washing water, adding the disodium EDTA, carrying out uniform mixing, then adding the triethanolamine, adjusting the pH value of a formula system to 5.5 to 6.5, then adding the plant essential oil and theamino acid surfactant which are uniformly premixed, and carrying out uniform mixing, standing and defoaming. The nourishing, moisturizing and cleansing milk provided by the invention has good effect of removing oil and dirt, is rich in water-soluble vitamins, micromolecular polypeptides, amino acids and micromolecular polysaccharides which are easily absorbed by the skin, and can exert the effectsof preserving moisture, increasing skin elasticity and preventing the skin from tightening and peeling due to dryness.