Abstract: The present invention relates to a processing method of sulfur using maggots in which fly egg is used to obtain effectively the processed sulfur so that domestic animal can take directly and safely the processed sulfur. That is, sulfur is over added to maggots food or the place where maggots can grow up, and when maggots discharge exudates to dissolute fodder, the sulfur presented randomly in the fodder is contact with the maggots exudates to dissolute fat that is become toxicity so that processed sulfur is obtained effectively through maggots?endless vigorous activity.