Abstract：Wastewater containing chromium was treated with periodic reversal electrocoagulation by using iron plate as electrode. Several affecting factors for the removal of chromium, such as initial concentration, pH, retention time, reversal period and current density were investigated. The results showed that the removal rates of total Chromium and Chromium (VI) were above 99.5% under initial concentration of 40 mg/L, pH of 8.0~9.0, retention time of 2min and current density of 16.37A/m2. Furthermore, the electrode passivation was reduced with the reversal period of 10~15min, and the energy consumption decreased by 10%~20%. The experiment results indicated that periodic reversal electrocoagulation was effectively and energy-saving for treatment of wastewater containing chromium.