The invention discloses a method for sweating and preparing rubber protecting wax. According to the method disclosed by the invention, an oil-soluble emulsifier and oil-soluble acid are dissolved in a sweating raw material to serve as an oil phase material on the basis of an ordinary sweating process, an inorganic salt solution serves as an aqueous phase material and is sweated after emulsification, a tiny space is formed after bubbles and salt solution produced by reaction between the oil-soluble acid and the inorganic salt are discharged, and a channel for discharging oil is formed so as to promote rapid discharge of the oil. Meanwhile, the wax and oil can be forcibly separated by utilizing airflow through a wax layer in the sweating process, so that unsuitable components for the rubber protecting wax in paraffin can be rapidly and effectively removed, and the rubber protecting wax product is produced by blending. The method disclosed by the invention has the advantages of low device investment, simple production process, low operating cost, no environment pollution caused by a solvent and environmental protection, and the rubber protecting wax is capable of achieving long-term effective protecting effect on the rubber and products thereof, and the like.