In order to study the non-isothermal flow characterization and influencing factors of heavy oil emulsions in porous media，the porous media is simplified into a model of variable diameter capillary tube bundle，and then the non-isothermal heat transfer process of the oil-in-water emulsion in the equilibrium state is converted into a steady heat transfer process containing a negative internal heat source. At the same time，considering the variation of temperature along the way and its effect on viscosity and interfacial tension of the dispersed phase，a calculation model for the non-isothermal flow of oil-in-water emulsion in porous media is established. The calculation results of sensitivity-analysis of non-isothermal flow of oil-in-water emulsion show that the inlet pressure increases with the decline of steam injection temperature，and the transition position between the gentle pressure drop section and the fast-decline linear section moves to the injection point；the larger the viscosity of the dispersed phase，the larger the pressure gradient required for the oil-in-water emulsion droplets to pass through the pore throat，and the higher the injection end pressure. With the increase of the volume fraction of the dispersed phase，the temperature drops faster along the way，and the pressure at the injection end gradually increases.