Abstract: Emulsions were made from low-softening-point rosin esters by the method of inversion process under atmospheric pressure. The effects of kinds, contents and addition methods of emulsifiers and co-emulsifiers and the processing conditions on the emulsion performance were studied and the reasonable process condition was determined. The results show that the optimal proportion of emulsifier RH-1 to ZR-1 is 5:1, optimal amount of RH-1 is 10%-13.2% of rosin ester mass, the optimal adding method of emulsifiers and co-emulsifiers is to dissolve them in water followed by hot-melting and with rosin ester together, optimal emulsification temperature is 100℃, optimal dripping rate before inversion process is 30～40 drops per minute and the stirring speed is 900 r/min. The particle size of the obtained emulsion under this condition is less than 250 nm, the conformance is less than 0.26, solid content is more than 55% and the stabilization period is more than 6 months.