In order to reduce high injection pressure in low permeability oilfield, MT-01 gemini surfactant has been synthesized for the test on the depressurization and injection augmenting effcct. The experimental results are as follows: when the mass concentration of MT-01 gemini surfactant is 800 mg/L, the surface tension can been decreased the lowest and can prevent the swelling of the clay, and the oil/water interfacial tension can be decreased effectively, the gemini surfactant makes the wettability of core surface change from hydrophilic to intermediate wettability. Finally, the gemini surfactant is good for improving water injection by core displacement experiments. The displacement pressure could be reduced up to 29％ and the relative permeability of the water phase could be increased up to 40％ by injecting 2 PV surfactant solutions in the range of 400~1000 mg/L. The new type gemini surfactant has a good application potential.