循环伏安法（英文：cyclic voltammetry, CV）是改变电位以得到氧化还原电流方向之方法。主要是以施加一循环电位的方式来进行，从一起始电位以固定速率施加到一终点电位，再以相同速率改变回起始电位，此为一个循环，可绘制一可逆氧化反应物分析所得的CV图，当从低电位往高电位扫瞄时，会使分析物产生一氧化电流的氧化峰（anodic peak），此CV图可帮助我们判断在何种电位时会发生氧化反应。

Cyclic voltammetry or CV is a type of potentiodynamic electrochemical measurement. In a cyclic voltammetry experiment the working electrode potential is ramped linearly versus time. Unlike in linear sweep voltammetry, after the set potential is reached in a CV experiment, the working electrode's potential is ramped in the opposite direction to return to the initial potential. These cycles of ramps in potential may be repeated as many times as desired. The current at the working electrode is plotted versus the applied voltage (i.e., the working electrode's potential) to give the cyclic voltammogram trace. Cyclic voltammetry is generally used to study the electrochemical properties of an analyte in solution.