The efficiency of the LIBS signal enhancement by deposition of gold nanoparticles prepared by laser ablation in acetone on the surface of the analyzed sample has been studied. The characteristics of the laser plasma generated on the steel surface before and after deposition of the nanoparticles have been compared. It has been established that deposition of nanoparticles increases the plasma volume and lifetime, but does not affect the erosion of the material. The deposition of nanoparticles results in the enhancement of the spectral lines intensities depending on the zone of the plasma plume selected for analysis: the signal enhancement grows with the distance from the sample.