The international performance and oil displacment were studied. Results showed that the CMC values were in the range of from 10-5 to 10-6 mol/L. The time expending to equilibrium interfacial tension extended with the increase of Geminis concentration. As the spacer length increased, the interfacial tension first increased to a certain point and then decreased. The Geminis displayed outstanding salt resistance. 2C13-C2-2C2SO4Na can enhance 5% EOR after water flooding as oil displacement agent in core flooding experiment.