Superhydrophobic coating is widely used in the fields of self-cleaning, anti-corrosion, anti-icing, water proofing, biomedical instrument. However, the poor durability prominently limits its application. In this paper, a robust Fe-based amorphous alloy superhydrophobic coating was prepared on Q235 steel via plasma spraying and further surface modification with 1H,1H,2H,2H-perfluorodecyltrimethoxysilane(FAS-17). SEM observation shows that the coating has a hierarchical topography with papillas in micron size and dendrite in submicron size on the papillas when the spray power is 30kW. The EDS and XRD results confirm that the submicron dendrite is consist of Fe oxidation, in which maghemite dominated. The submicron dendrite cannot be found for 15kW. Thus the WCA improved from 140°±4°to 154°±3°when the spray power increased from 15kW to 30kW. And the rolling angle test shows that the 15kW sprayed coating has an ability of high water adhesion, and on contrary the water rolling angle of 30kW sprayed coating is less than 1°. The less corrosive current obtained from Tafel curves indicates higher corrosion resistance of the coatings than the substrate. The higher microhardness implies a good robustness of the coatings.