The redox properties of bismuth antimony telluride solutions, including the solely component, the mixed solution, and the effect of tartaric acid addition, were analyzed via cyclic voltammetry in this study. Tartaric acid can improve the solubility of Sb^(III) in solutions, however, due to the strong complexing, too much tartaric acid results in reducing the reduction potential and lowering the reduction current of Sb^(III). The reduction potential of mixed solutions was more positive than solely component solutions owing to underpotential deposition. Ternary solution shows two reduction peaks in cyclic voltammogram, the first peak and the second peak can correspond to the reduction of bismuth telluride and antimony telluride, respectively.