There are some difficulties in the development of Hai26 block in Liaohe oilfield，such as high oil viscosity and poor performance of conventional water flooding. Based on the evaluation of surface activity，interfacial tension，temperature tolerance and absorbability of ten kinds of surfactants，the most suitable surfactant was selected for Hai26 block.Through the one dimension flooding experiment，the injected water temperature，the influence of surfactant concentration and injection way on the recovery ratio was explored. The results showed that：as the injected water temperature increased， the recovery ratio increased at the same time，and the recovery ratio changed smoothly when the temperature was above 120 ℃. The recovery ratio increased with the concentration of the surfactant until it reached to 0.3%. The recovery ratio of multi-slug injected way was higher than that of single slug injected way. At the optimized conditions，the injected water temperature of 120 ℃，the surfactant concentration of 0.3% and 4 cycles of alternating injection，the ultimate recovery efficiency of hot water and surfactant flooding was 83.67%.