Abstract: The electrochemical behavior of Malachite green(MG) in the micellar solution of Cetylyrldinium bromide(CPB) was studied by cyclic voltammetry(CV) at GCE, and also compared with that in PBS. At scan rates of 20~300 mV/s, the peak current(I_p) varies with the square root of the scan rate, which shows the electrochemical oxidation of MG is a diffusion-controlled electrode process. The influence of solution pH on the oxidation peak current(I_p) and peak potential(E_p) for MG was studied in a pH range of 2.0 to 8.0. It was found that MG was oxidized with no proton participation in the electrode process between pH 4 to 8. The electrochemical kinetic parameters of MG with and without CPB micellar solution were determined by chronocoulometry(CC) and chronoamperometry(CA). Diffusion coefficient D, electron transfer coefficient α, and the electrode reaction rate constant K_f were 2.34×10^-6 cm²/s and 2.51×10^-6 cm²/s, 0.56 and 0.72, and 3.95×10^-4 s^-1 and 9.12×10^-4 s^-1, respectively. Also the influence of PBS and MG concentration on the interaction of CPB and MG were studied and a reasonable explanation was given. It was found that the critical micelle concentration(CMC) of CPB was reached earlier and the plateau of the oxidation peak current was lower at high concentration of PBS. With the increasing of the MG concentration, the oxidation peak potential shifted positively and the peak current decreased with the MG concentration in the range of 2.0×10^-2~8 mmol/L.