The invention relates to the technical field of calcium stearate, particularly a water-based calcium stearate emulsion, and a preparation method. Background technology: Calcium stearate emulsion is a white viscous liquid with the formula ca(c17h35coo)2, an excellent lubricant. It can be used in starch, casein, or emulsion coating. Since calcium stearate is insoluble in water, adding an emulsifier and dispersant is necessary to prepare water-based calcium stearate emulsion to achieve a dispersion effect. The existing water-based calcium stearate emulsion still needs a better dispersion effect. Even if an emulsifier and dispersant are added, it is easy to precipitate, and flocculation stratification will occur after a long time. In addition, preparing water-based calcium stearate emulsion requires high-speed stirring and grinding under the heating condition, which leads to complex production technology and high production cost. Therefore, developing a water-based calcium stearate emulsion with a good dispersion effect, long-time storage, simple production process, and low production cost has broad market prospects. Technical realization elements: The technical problem to be solved by the invention is providing a water-based calcium stearate emulsion and a preparation method. The water-based calcium stearate emulsion has a simple production process, a good dispersion effect, and can be stored for a long time. The following technical solutions realize the above technical problems to be solved by the invention: a water-based calcium stearate emulsion contains the following raw material components by weight: 25 ~ 60 calcium stearate; Emulsifier 10 ~ 20; 0.1 ~ 1 part of defoamer; Preservatives 0.1 ~ 1; Water 40 ~ 70 parts. Preferably, the water-based calcium stearate emulsion comprises the following raw material components by weight: 30 ~ 40 calcium stearate; Emulsifier 10 ~ 15; 0.1 ~ 0.5 copies of defoamer; Preservatives 0.1 ~ 0.5; Water 40 ~ 55 parts. If you are looking for high quality, high purity and cost-effective water-based calcium stearate, or if you require the latest price of water-based calcium stearate, please feel free to email contact mis-asia.