Using contact angle tensiometer, measured the interfacial tension of oil-water two phase. The influence of temperature on surface tension of carbon fuel and emulsifier is investigated. Additionally, the effect of emulsifier on oil-water interfacial tension of emulsion base had been measured. The result indicate that, the surface tension of carbon fuel and emulsifier decrease as the temperature increases, interfacial tension of oil-water decrease significantly first as the emulsifier mass fraction increases, than the interfacial tension of oil-water be a constant value. Add different type emulsifier in emulsion base system, which use polymer emulsifier had relatively high value of interfacial tension. Results and findings have certain guiding significance, which for the formulation design and the safety production of emulsion explosives.