The dynamic interfacial properties of alkylbenzene sulfonates with alkane were studied from many aspects, such as the weight of the surfactant, the carbon number of alkane, the concentration of alkali and the concentration of surfactant. The results show that with the higher of the weight of surfactant and the concentration of the electrolyte is, the more quickly of the interfacial tension changes, the less of the time balances. With the higher of the concentration of surfactant and the carbon number of alkane, the slower of the interfacial tension changes, the less of the time balances.

Key words: alkylbenzenesulfonate， dynamic interfacial tension, tertiary oil recovery