A series of (Ge15Ga10Te75)100x(KBr)x (x=2, 4, 6, 8 mol%) far infrared transmitting chalcogenide glasses was prepared by the traditional meltquenching method. Some instruments of Xray diffraction, differential scanning calorimeter were adopted to test the structure and physicochemical properties of the glasses. At the same time, the effects of KBr to GeGaTe glasses on glass forming, net structure and thermal stability, UVVis absorption and FTIR spectrometer were adopted to study the optical properties of the glasses with the dopant of KBr. The Tauc equation was adopted to calculate the direct and indirect optical band gaps of the bulk glasses. The results show that a redshift appears in the absorbing cutoff edge of shortwave in the glasses, cutoff edge of longwave IR just keeps the same regardless of the increase of KBr content. The group of glasses can keep the superiorities of stable and wide infrared transmission.