According to the reservoir condition of Shengli oilfield, the new surfactant/polymer binary compound system, microscopic models (core flake) flooding experiments and normal cylindrical core flooding experiments are carried out in the laboratory. Based on the water flooding effect, the flooding effects of surfactant flooding, polymer flooding and SP binary compound system are compared,and focusing on the washing oil capacity and carrying oil capacity of the surfactants, polymers and SP binary compound system in the microcosmic pore and the microscopic seepage properties in the process, and the microscopic mechanism of SP binary compound system are tested thoroughly. The results show that the flooding effect of binary compound system is better than that of polymer or surfactant flooding. In the visualization flooding experiments of the core flake, different flooding sweep efficiency of 3 different solvents result in the different residual oil area in the core flake, and residual oil area of SP binary compound system is the least, while its sweeping efficiency is the highest of the three, and its sweeping efficiency is raised by about 2.59% and 11.8% percentage than polymer flooding and surfactant flooding, respectively. In the normal cylindrical core flooding, the displacement efficiency of SP system flooding is raised by about 1.43% and 20.70% than polymer flooding and surfactant flooding, respectively.