Based on software Fluent, standard k ε turbulent model, eddy dissipation combustion model and DO radiation model combined with oxy fuel combustion space with glass fluid surface by UDF program were used to study the oxy fuel glass furnace. The temperature field, velocity field and pressure field were obtained, and were better at analyzing heat and mass transfer when the furnace was working. Based on comparison between the simulation and practice in factory, it can be suggested that the mathematical model can accurately reflect the glass melting process. The studies are really useful for improving the working conditions and the service life of glass furnace, reducing the risks and optimizing designs.