The invention discloses an end-feedback broadband wide beam ridge horn. The end-feedback broadband wide beam ridge horn comprises a rectangular horn shell (1), a trapezoidal waveguide ridge (2) and a coaxial connector (3), wherein the trapezoidal waveguide ridge (2) is arranged on the inner wall of the rectangular horn shell (1) and is fixedly connected to the rectangular horn shell (1) and the coaxial connector (3); the rectangular horn shell (1) and the trapezoidal waveguide ridge (2) compose a ridge waveguide structure. By utilizing the characteristic that the ridge waveguide structure is small in structure, the caliber of the waveguide is adjusted, the distance from the trapezoidal waveguide ridge to the inner wall of the rectangular horn shell is changed, and the distance between the trapezoidal waveguide ridge and the coaxial connector is adjusted; matching between impedance 50 ohm of a coaxial line input end and impedance 377 ohm of free space wave at the output end is realized by utilizing ridge-shaped conversion type waveguide output by the end face and coaxial conversion. The end-feedback broadband wide beam ridge horn can realize broadband optimal matching and meet with a wide-angle coverage requirement, an input standing wave VSWR is less than 1.5 within a frequency range of a nearly octave, and a directional diagram can meet with an antenna scanning need.