Abstract: The reforming process of lower alcohols aqueous solution by cathodic glow discharge plasma，in which hydrogen was produced across a gaseous envelope over the cathode，was studied.The experiments using water and lower alcohols water mixture as reforming raw materials to generate hydrogen-rich gas were conducted.The experimental results showed that lower alcohols molecules were more active than water molecules.The cathodic liberated gases were mixtures of hydrogen，carbon dioxide and carbon monoxide and the concentration of hydrogen was about 95%.The energy consumption per cubic meter gas was 2.690×10³ kJ•m^-3.The influence of voltage across the circuit on the composition of cathodic gas and power consumption per cubic meter gas was analyzed.It was found that plasma density increased with the increase of voltage，and the quantity of decomposed solvent molecule and solute molecule increased in the course of voltage increasing.The influence of lower alcohols concentration in solution on the composition of cathodic liberated gas and power consumption per cubic meter gas was investigated.