The traditional cooker magnetron power supply consists industrial frequency transformer, whichis bulky, inefficient and with high harmonics distortion. There are numerous researchers whoinvestigates magnetron power supply design with soft switching converter, in order to reduceweight and improve efficiency [7–10]. However, no investigation currently exists on harmonicdistortion of traditionalmagnetron power supply, and very little research or analysis is done onharmonic distortion of new type of magnetron power supply. This project aims to investigateharmonic distortion of traditional magnetron power supply in the first phase. In the secondphase, a novel design of high frequency and low harmonic distortion magnetron power supply istargeted.