The invention relates to a half-mode substrate integrated waveguide band-pass filter, in particular to a half-mode substrate integrated waveguide band-pass filter loaded with T-shaped defected ground structures and belongs to the field of wireless communication. The half-mode substrate integrated waveguide band-pass filter loaded with the T-shaped defected ground structures aims to solve the problem that a common substrate integrated waveguide band-pass filter is high in working frequency, the relative bandwidth is small, and the common substrate integrated waveguide band-pass filter cannot be applied to a mobile communication system. The half-mode substrate integrated waveguide band-pass filter loaded with the T-shaped defected ground structures comprises a first metal printing layer, a dielectric substrate, a second metal printing layer and two balance microstrip lines, wherein the dielectric substrate is a rectangular board body, the first metal printing layer is a rectangular metal thin plate, the first metal printing layer, the dielectric substrate and the second metal printing layer are stacked in sequence from top to bottom, the first metal printing layer is printed in the middle of the upper surface of the dielectric substrate, and the second metal printing layer is printed on the lower surface of the dielectric substrate.