Abstract: The simulated samples of carbon & stainless steel were decontaminated by the suspension electrolysis decontamination device designed by our laboratory. The results of decontamination show that suspension electrolysis decontamination formula mainly contains sulfuric acid and sodium sulfate. When the electrolytic voltage is 6 V, for the simulated carbon steel samples, after 2 h decontamination, their surfacial radioactivity can drop to the background level; for the simulated stainless steel samples, after 3 h decontamination, their decontamination factor can reach 180. The electrochemical performance analysis show that the suspension electrolysis decontamination formula can prevent anodic polarization effectively, and have a good stability in the operation of electrolytic decontamination.