Cationic Gemini surfactant was synthesized directly from 1,4-Bis -(chloromethyl)-benzene, N,N-dimethyldodecylamine and N,N-Dimethyltetradecyl -amine. In order to obtain optimal reaction conditions, orthogonal experiment was conducted. The optimal reaction condition was performed with the molar ratio of amine and XDC 2.2:1 at 75℃ for 3 h. The chemical structure of the purified product was confirmed by FT-IR, 1HNMR and 13CNMR. The aqueous solution surface activity properties were studied and the results showed that the surface tension (γCMC) are 40.71 and 35.37 mN?m-1, critical micellar concentration (CMC) are 1.36?0-5 and 2.56?0-6 mol?L-1 , pC20 are 5.63 and 6.18, excess adsorption amounts(Γmax) are 2.41?0- 6 and 3.09?0- 6 mol?m-2, the saturation adsorption areas permolecule (Amin) are 0.69 and 0.54 nm2. The CMC of the Gemini surfactants are only one percent of the monomer similar as its corresponding monomer.