The invention relates to an improvement on the resonance chamber of micro-wave plasma lighting device, wherein said micro-wave plasma lighting device comprises: a high-voltage generator, a micro-wave generator, a micro-wave tube, a protrusion, a resonance chamber, a non-electrode bulb, a flat mirror, a motor, a cooling fan, an air guide transmission tube, and the second motor; said resonance chamber is formed by the hollow cylinder which is sealed and at least two blades at the inner wall of cylinder. The invention can improve the couple ability of resonance chamber on the micro-wave energy, reduce the activate hardness of plasma, and improve the energy utilization. |