Based on the research on the material balance and energyEnergy balance of the electrolysis cellElectrolysis cell, and combined with the simulationSimulation analysis of the key technological parameters of the historical operation of the 500 kA electrolysis cellElectrolysis cell with graphitized cathodeGraphitized cathode, the influences of aluminum electrolysisAluminum electrolysis temperature, cryolite ratio, aluminumAluminum level, and average voltage on the DC power consumption of aluminum electrolysisAluminum electrolysis were described, and the key technological parameters of aluminum electrolysisAluminum electrolysis were coupled. The range of the optimal DC power consumption of the key technical parameters of aluminum electrolysisAluminum electrolysis was found and combined into a control model of the key technical parameters of the process. The optimal control model was used to guide the production practice. Under the guidance of the control model the current efficiency of aluminum electrolysisAluminum electrolysis increased, and the DC power consumption decreased significantly. The DC energy consumptionEnergy consumption was reduced by 87 kWh/t-Al. Good technical results were achieved.