Abstract: To improve the corrosion resistance of 316L stainless steel in the marine environment, a nanosecond fiber laser was used to etch the surface of the sample.A superhydrophobic stainless steel surface with a contact angle greater than 160°and a rolling angle less than 3° could be prepared by the method.The observation results of the sample surface using white light interferometer and scanning electron microscope(SEM)show that with the increase of laser power, the surface roughness of the sample surface also increases, and obvious micron strips/pits and spherical structures appear, which can provide structural support for the establishment of the superhydrophobicity on the surface.The corrosion current density of the untreated 316L stainless steel surface is 1.316×10^-6 A·cm^-2, while the corrosion current density of the superhydrophobic sample surface prepared with 100 W laser power is 1.349×10^-7 A·cm^-2, and the corrosion inhibition efficiency can reach 89.75%, which indicate that the prepared stainless steel surface has good corrosion resistance.