This article analyzes changes in the surface morphology of SLM materials after exposure to an electrolyte plasma jet. The study was conducted for various alloys obtained using this technology. The following materials were selected: Inconel 718, EP648, AISI 316L. It was shown that the jet impact on the surface of these materials has a significant effect. The research results showed that the most significant decrease in the roughness parameter Ra is achieved through dimensional processing. Of the process parameters, the greatest influence on the roughness parameters is exerted by an increase in the current density on the sample surface, the volume of the passed electrolyte and its concentration. A decrease in the current supply, an increase in the temperature of the electrolyte passed through the interelectrode gap leads to a decrease in the roughness parameter Ra. It is shown that the shape of the tool electrode has a great influence on the technological process. Electrostatic modeling of the process was carried out in the COMSOL Multiphysics environment. The effect of surface defects of different sizes and shapes after the SLM process on the magnitude of the electric field strength is considered. It is shown that increasing the electric field intensity on macro-irregularities has a positive effect on dimensional processing while reducing surface roughness. Studying the surface morphology showed that the surface of SLM materials has numerous defects associated with the technological process. Their removal helps to improve the functional properties of various products. The results obtained can be used for jet electrolytic-plasma processing of a wide range of products obtained by selective laser melting.