According to the issues that the system of S/P binary complex’s adsorption on the rocks which resisted in the oil reservoir, with the analyzing methods such as indoor instruments , the concentration and interfacial tension of the active agent was tested and evaluated after which, belonging to the system of alkali-free binary complex’s adsorption ,was used to absorb the Daqing wetting or non-wetting oil sands. The results showed that: the adsorption isotherm of binary system surfactant on the Daqing oil sands is the type of “S”, the maximum adsorption is 2.43mg/g;With changing single adsorption of oil sands, the times of adsorption increase, interfacial tension increase, the concentration of surfactant decrease; When the third adsorption, we can see from the oil sand is soaked by polymers and waste water, binary complex’s interfacial tension ascends from 10-3mN/m to 10-1mN/m;Repetitious adsorption have a little influence on the interfacial tension of binary system. With the increase of the times of adsorption, the concentration of surfactant decrease.