Abstract: The impressed current cathodic protection system applied in tankfarm depot includes the following characteristics: anode bed, composed of a mixed metal oxide anode mesh ribbon anode and cross-weld titanium plates; a dual reference electrode, consisted of CSE and highpurity zinc reference electrode; filler composed of 75% gypsum powder (CaSO4 • 2H2O), 20% bentonite and 5% sodium sulfate; cathode and anode cables passing through the junction box are connected to potentiostat. The system output is controlled by a digital high-frequency switch in IHF potentiostat. The impressed current CP system applied in Lisa Tankfarm shows that the system can greatly extend the lifetime of the tank with duration, high efficiency, safety, energy saving and controllability.