To improve the bonding strength of the coating with ultra-thin 316L stainless steel (316L SS) material, the ultra-thin 316L stainless steel material (0.1 mm thickness) was anodized in perchloric acid and glycol electrolyte, and the nano-scale microporous structure was successfully obtained on the surface of 316L sheet. The morphology and microstructure of 316L SS were investigated by XRD and SEM. The results show that: the micropores on the surface of the obtained stainless steel sheet are obvious and continuous when the volume fraction of perchloric acid in the electrolyte is 2.0%, the volume fraction of ethylene glycol is 98.0%, the oxidation temperature is 4 ℃, the oxidation potential is 30 V, and the anodizing time is 10 min. The characteristic diffraction peaks of 316L SS samples are almost the same before and after anodic oxidation, and the corrosion resistance of the samples after anodic oxidation is better. Micro/nano pores are beneficial to the formation of uniform and compact coatings on the surface of 316L SS samples, and improve the bonding strength between coatings and substrate..