According to single factor experiments, the surfactant system CQBH-1 was obtained by compounding heavy alkyl benzene sulfonic acid sodium (A1) with isopropanol (CH-2), Isomeric alcohol ethoxylates (F-2) and Gemini surfactant (GL-2) in mass ratio of 3:6:2:2, the price of which is lower than commonly used surfactants in oil field by more than 20%. The compatibility, adsorption and displacement experiments were conducted. The results showed that the interfacial tension between CQBH-1 solution with mass fraction 0.3%~0.5% and the simulated crude oil of Changqing oilfield was 5×10-3—8×10-3 mN/m. CQBH-1 had good compatibility with Changqing oilfield injected water, formation water and simulation crude oil in normal pressure and at the temperature of 60℃, and had good resistance to adsorption. After static adsorption, the interfacial tension between CQBH-1 solution with mass fraction of 0.3%—0.5% and the simulated oil could reach super-low interfacial tension. Core displacement experiments showed that on the basis of water flooding of average oil recovery of 56.70%, the oil recovery of the artificial cores with permeability of 1.1×10-3—100×10-3 μm2 could be enhanced by 10.48% through injecting 0.3 PV of CQBH-1 surfactant solutions.