The invention relates to the technical field of skin care products, in particular to a moisturizing microcrystalline lotion and a preparation method thereof, comprising the following raw materials in parts by weight: water, humectant, sea grape extract, pH regulator, moisturizing soothing agent, suspending agent, moisturizing Skin agent, preservative, essence, Turkic rose flower oil, rose flower water, water, humectant, pH regulator, moisturizing soothing agent and suspending agent are mixed evenly, heated and dissolved, stirred evenly, and then homogenized at 350-380MPa, Cool down to 40-50°C, add sea grape extract, essence, and preservative according to the above ratio, stir for 5 minutes, filter and defoam, finally add emollient, stir for 0.5-1min, and control the particle size of oil beads at 1- Moisturizing Micro-Crystal Lotion with 1‑2mm diameter oil droplets suspended in the transparent water agent can be obtained within 2mm. It contains uniform oil bead molecules in the water-based system, which has good moisturizing effect, outstanding water-locking effect, and excellent long-lasting moisturizing performance .