A novel type of cationic-nonionic gemini surfactant DAEQ9-Cl was synthesized with lauryl alcohol polyoxyethylene (9), dimethyl sulfoxide and tetramethylethylenediamine as the main starting materials. The main reaction includes chlorination and quaterisation. The optimum reaction conditions was ascertained as follows: n(dimethyl sulfoxide) : n(lauryl alcohol polyoxyethylene (9)) = 1.5 : 1, the reaction taking place at 80 oC for 8h, with pyridine as catalyst, the yield was 87%. In the quaterisation process, intermediate and tetramethylethylenediamine (2:1) reacted at 80 oC for 3d, the yield was 79%. The target product was identified by IR and 1H NMR. The critical micelle concentraton (cmc) is 3.2×10-2 mmol/L and γcmc is 33.44 mN/m at 25 oC in aqueous solution. DAEQ9-Cl shows a synergic effect when blended with AEO-9. The best compatibility effect was achieved at a molar of 4 : 6. The best compound system shows cmc=6.78×10-3 mmol/L, γcmc=28.5mN/m. This new surfactant exhibits higher foaming ability and foam stability.