A series of binary tellurite based glasses (Bi2O3) x (TeO2)(100-x) was prepared by melt quenching method. The density, molar volume and refractive index increase when bismuth ions Bi3+ increase, this is due to the increased polarization of the ions Bi3+ and the enhanced formation of non-bridging oxygen (NBO). The Fourier transform infrared spectroscopy (FTIR) results show the bonding of the glass sample and the optical band gap, E-opt decreases while the refractive index increases when the ion Bi3+ content increases.