Preparation method of wear-resistant super-hydrophobic antibacterial surface in nitrogen atmosphere

The invention discloses a preparation method of a wear-resistant super-hydrophobic antibacterial surface in a nitrogen atmosphere. The preparation method comprises the following steps: S1, pretreating a stainless steel surface; s2, performing laser etching on the pretreated stainless steel surface by adopting picosecond laser to form an orderly arranged periodic mastoid-nanoparticle composite structure on the stainless steel surface, and cleaning to remove ablated molten particles or impurity particles on the stainless steel surface after laser etching; the laser etching is carried out in a nitrogen atmosphere; the specific parameters of the laser etching are as follows: the laser wavelength is 1064nm, the laser pulse width is 1-5ns, the single pulse energy is 0.14-0.48 mJ, the frequency range is 80-140kHz, the scanning speed is 50-150mm/s, the scanning interval is 10-30mm, the scanning frequency is one time, and the scanning path is in an S-shaped parallel line shape; and S3, chemical treatment or aging trea