Accordance with high temperature reservoir conditions of forth oil series of Shuanghe oilfield，the interfactial properties，emulsification property，thermal stability，resistance to adsorption performance and oil displacement performance of surfactant/ polymer（SP）combinational flooding solution composed of the surfactant SH7 and polymer 1630S was evaluated. Experimental results showed that，when the concentration of SH7 was higher than 500 mg/L，the oil-water interfacial tension between SP combinational flooding solution with the 1630s concentration of 1500 mg/L and the crude oil was up to 10^-3 mN/m，and when the concentration of SH7 surfactant was higher than 1000 mg/L，the interfacial tension could be up to 10^-4 mN/m orders of magnitude and reached to ultra-low interfacial tension within 30 min. The emulsifying performance of the 1500 mg/L1630s+2000 mg/LSH7 binary system was good，and the viscosity of emulsion system with oil-water ratio of 7∶3 was 7 times higher than that of the SP binary complex system. The SP binary complex system was resistant to core adsorption，the interfacial tension between SP system after five times adsorption and the crude oil could be still up to 8.82×10^-4 mN/m. Long-term thermal stability of polymer and the SP binary system was good when the oxygen content in the system was lower than 0.8 mg/L，after aging 180 days at the temperature of 95℃，the viscosity of the system was still higher than the initial value，and the oil-water interfacial tension could keep at 10^-4 mN/m orders of magnitude. The homogeneous cores displacement experiment results showed that when injecting 0.606 PV of SP binary composite flooding after water flooding，the oil recovery could be increased by 22.16% on the basis of water flooding ，recovery rate being of 42.26% ，and was 6% higher than that of polymer system at the same concentration. Three times differential permeability experiments showed that the best slug size of the SP system was 0.6 PV，the enhanced oil recovery rate was 16.23%.