A type of fan axial flow CO2 laser based upon resonant silent discharge has beendeveloped successfully.Its electrodes were arc sprayed on the surface of fused silicadischarge tubes,and.the discharge was sustained by a resonant inverter tuned at about 100kHz. The sprayed electrodes proved excellent adhesion, and the belieal ones offered verygood discharge uniformity. When operated at 5 kPa gas pressured and CO2:N2:He=1:17:2 mixing ratio, the output of this laser was 225 W with 8% wall plug efficiency. The very high and low contents of N2 and He in the mixed gas made this laser different from others.