The invention discloses a fractal media resonant antenna used as a paraboloidal feed source. The fractal media resonant antenna used as the paraboloidal feed source comprises a feed circular waveguide and a media radiator; the media radiator comprises a front internal cylindrical media matching section and a rear external tapered media radiator which are respectively a cylinder body and a tapered body prepared by rotating forming contour lines. The fractal media resonant antenna used as the paraboloidal feed source has the advantages of being large in bandwidth, large in beam width, low in sidelobe and back lobe levels, uniform in amplitude and phase distribution in a main lobe, low in cross-polarization level, high in gain, high in efficiency, small in size, and low in cost; the antenna has the optimal type suitable for a paraboloidal reflector feed source with relatively small focus-diameter ratio F/ D.