Abstract: The surface epoxy nano SiO2 was prepared by sol-gel method using four tetraethyl orthosilicate (TEOS), sixteen alkyl three methyl ammonium bromide (CTAB), and gamma (2, 3- epoxprooxy) propyl trimethoxysilane (KH560) as raw materials. The ODA-SiO2 was prepared by affinity addition reaction of the primary amine end group of the eighteen amine (ODA) with the epoxy on the surface of the nano SiO2, and used for the preparation of waterborne epoxy. Anticorrosive coating. Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to characterize the successful grafting of ODA onto SiO2 surface. The corrosion resistance of waterborne epoxy coating was analyzed by electrochemical test and salt spray resistance test. The results show that the waterborne epoxy coating containing 0.3 wt% ODA-SiO2 has good corrosion resistance and salt spray resistance time is 500h.