Laser pulses(1.06 μm)were used to irradiate glassy carbon electrodes (GCE)and carbon fibre electrodes.The activity of surface can be effectively improved after carbonelectrodes have been treated.The rate of electrode reaction for Fe3+/2+ and ascorbic acid onelectrodes was dramatically increased.We suggest that the result is associated, under theirradiation of very short and high power laser pulses, with the removal of inactive layers,change of microstructure and exposure of more active sites on the carbon electrodes.