Using the Hertz elastic theory and fractal geometric theory, a normal contact revised loading fractal model of fretting joint interface, in terms of the characteristic of the surface micro bulge’s deflexion, the smooth and continuous condition of normal contact load acting on surface micro bulge as well as strictly distinguishing elastic deformation and fully plastic deformation, is proposed. The no differential condition of Weierstrass-Mandelbrot fractal function is put forward. The anisotropic nonstationary three-dimensional random surface topography is emulated utilizing the Ausloos-Berman fractal function with a random phase. The power-law relationship of the form between surface micro bulge’s normal elastic contact load and its normal deformation is brought forward. Whilst the calculating method of differential function not partial differentiable function solving fretting joint interface two micro bulges’ interacting normal contact stiffness is established. The numerical emulation results indicate that the real contact area first adds and then diminishes with the increase of fractal dimension of a surface profile at the constant load. The real contact area increases with increasing normal contact load, but decreases with increasing fractal roughness. The fretting joint interface normal contact stiffness increases with increasing real contact area, normal contact load, relating factor and material property parameter, but decreases with the increasing of fractal roughness. When fractal dimension of a surface profile is smaller, the fretting joint interface normal contact stiffness increases as fractal dimension of a surface profile increases from 1; however, when fractal dimension of a surface profile becomes larger, the fretting joint interface normal contact stiffness at times decreases as fractal dimension of a surface profile increases approaching 2. Constituting normal contact revised loading fractal model of fretting joint interface helps to analyze the unloading model between fretting two contact surfaces.