Abstract: According to the complicated calculation shortage of the SVPWM algorithm for the conventional frequency converter in the underground mine,the paper had a study on the SVPWM algorithm of the mine frequency converter based on the 60° coordinate system.With a simple logical judgment,the algorithm could have the certain location of the reference vector.With the simple plus and minus operation,the basic vector function time could be obtained and the SVPWM operation could be hi ghly simplified.Based on the circumstances,a study was conducted on the over modulation of the SVPWM algorithm under the 60° coordinate system.DSP waves showe d that based on the mine with the 60° coordinate system,the SVPWM algorithm of the mine frequency converter would be correct.