A series of TeO2-TiO2-Bi2O3 glasses were prepared by using conventional melting and quenching method. Their densities, transition temperatures, crystallization temperatures, refractive indices, absorption spectra were measured. The allowed direct transition and indirect transition, and Urbach energy of samples were calculated according to classical Tauc equation. The relationships between thermal stability and glass compositions were discussed. The effects of molar refraction、 metallization criterion, optical band gap, Urbach energy, contents of TiO2 and Bi2O3, and optical basicity on refractive indices of glass samples were also discussed . The results show that the TeO2-TiO2-Bi2O3 glass system has good stability. With the increase of molar refraction the refractive index increases, optical band gap and metallization criterion shrink. Meanwhile, the high third-order non linearity is associated with high optical basicity.