The quaternized chitosan (QCS) anion exchange membrane was prepared by using melamine (MA) as crosslinking intermediate and glutaraldehyde (GA) as crosslinking agent. The mechanical property, OH^- conductivity, alkaline stability and other characterizations were investigated to discuss how melamine content affects these properties. During crosslinking of melamine/GA with QCS, a dense, continuous structure was constructed and some folds can be observed on membrane surface. Better performances of mechanical property, OH^- conductivity and alkaline stability were achieved by introducing melamine into membrane structure. Results show that QCS-MA4% membrane possesses a good tensile strength of 33.79 MPa, reaches a OH^- conductivity of 4.83 ×10^-2 S/cm at 70 ℃ and only 2.81% decline of OH^- conductivity can be observed after immersing in 6 mol/L KOH solution (60 ℃) for 120 h, indicating an excellent alkaline stability.