The corrosion resistance of the Cu-Zn-Al shape memory alloy passivated by benzotriazole was investigated bysalt spraying test and electrochemical methods in artificial Ringer’s solution. The results showed that after benzotriazolepassivation, the corrosion resistance of the Cu-Zn-Al shape memory alloy was improved evidently. The anodic polarizationcurrent density of the passivated alloy decreased, the mass loss reduced, the anodic passivation accelerated, the anodic ac-tive dissolution was inhibited effectively, and the surface tarnishing was restrained. Infrared reflection spectrum test showedthat Cu(l)-benzotriazole or Cu(II)-benzotriazole complex layer was formed on the surface of the Cu-Zn-Al shape memoryalloy after passivation. This layer appeared plane, well adhesion, and presented homogeneous golden metallic luster. Thecorrosion resistance of the Cu-Zn-Al shape memory alloy passivated by benzotriazole is improved for the formation of anelectrochemical stable baffle layer on passivated surface. This layer separates the metal substrate from the outside corrosionmedium effectively and retards the corrosion process of dezincification. The corrosion resistance of the Cu-Zn-Al shape memory alloy passivated by benzotriazole was investigated by spraying and electrochemical methods in artificial Ringer’s solution. The results showed that after benzotriazole passivation, the corrosion resistance of the Cu-Zn-Al shape memory alloy was improved evidently. The anodic polarization current density of the passivated alloy decreased, the mass loss reduced, the anodic passivation accelerated, the anodic ac-tive dissolution was cured effectively, and the surface tarnishing restrained. Infrared reflection spectrum test showedthat Cu (l) - Benzotriazole or Cu (II) -benzotriazole complex layer was formed on the surface of the Cu-Zn-Al shape memory alloy after passivation. Al shape memory alloy passivated by benzotriazole is improved for the formation of anelectrochemical stable baffle layer on pass ivated surface. This layer separates the metal substrate from the outside corrosionmedium effectively and retards the corrosion process of dezincification.