A series of (100-x)(GeTe4.3)-xAgI(x=5, 10, 20, 30)chalcogenide glasses were prepared by traditional melt-quenching method. The density was obtained by the Archimedes principle. The thermal property was analyzed by XRD diffraction and DTA curves. The optical property was analyzed by UV-VIS-NIR absorption spectrum and Infrared transmission spectrum, respectively. The results show that with the increasing of AgI content, the density of the glasses increases from 5.591 g·cm-3 to 6.314 g·cm-3 and the glass system has high refractive index from 3.73 to 5.70. The glass samples are amorphous, resulting in a wide composition range of glass formation. A maximum glass transition temperatures value of Tg (206 ℃) was obtained for x=5. A red-shifting occurs in the short-wavelength absorption cutting-off edge and the infrared cut-off wavelength is nearly unchanged. The infrared transmission edge is beyond 25 μm, which provides an important candidate for the development of far-infrared Te-based chalcogenide glass materials.