The electrochemical corrosion behavior of laser-cleaned AH32 steel in 3.5% (mass fraction) NaCl solution was studied herein through the electrochemical method to investigate the effect of laser cleaning (LC) on the corrosion resistance of steel. The polarization curve, electrochemical impedance spectroscopy, and surface morphology of the sample were tested and analyzed. Results show that the corrosion resistance of AH32 steel is improved post LC. Within the material damage threshold, the self-corrosion potential of AH32 steel moves in a positive direction with increasing laser energy density and spot overlap rate; simultaneously, the corrosion current density decreases, and the impedance arc becomes larger, thereby the corrosion resistance increases. The corrosion resistance of AH32 steel is the best when the laser energy density is 20 J/cm ², and the spot overlap ratio is 50%. These results can provide a reference for studying surface properties post nanosecond pulse LC.