Water-based lubricant for papermaking and preparation method thereof

The invention discloses a preparation method of a water-based lubricant for papermaking. The water-based lubricant for papermaking is obtained by mixing and reacting glycerin stearate, isomeric alcohol polyoxyethylene ether, oleic acid, alkali, a bactericide and water. The water-based lubricant for papermaking, prepared by the method provided by the invention, is applied to papermaking coatings for coating paper, can apparently improve the smoothness of the paper surface, can improve the glossiness of paper, and is convenient and simple in preparation and convenient to operate.