The effects of the composition on the consolidation temperature and refractive index of the glass thin film fabricated by aerosol flame deposition method in SiO$_2$-B$_2$O$_3$-CaO-P$_2$Oulcorner system were investigated. When the amount of CaO was constant in SiO$_2$-B$_2$O$_3$-CaO system the consolidation temperature of glass thin film decreased with increasing the amount of B$_2$O$_3$. Also, when the amount of SiO$_2$ and B$_2$O$_3$ was constant the consolidation temperature of glass thin film increased with increasing the amount of CaO. P$_2$Oulcorner was added to 72.5SiO$_2$-25B$_2$O$_3$-2.5CaO in order to decrease its consolidation temperature. As the amount of P$_2$Oulcorner increased its consolidation temperature decreased and the refractive index linearly increased from 1.4649 to 1.4684. When the amount of CaO and P$_2$Oulcorner was constant in SiO$_2$-B$_2$O$_3$-CaO-P$_2$Oulcorner system the consolidation temperature of glass thin film decreased with increasing the ratio of SiO$_2$/B$_2$O$_3$.