A method for directly producing high-purity gold from rough gold includes the four main steps of casting of a gold anode plate, solution making, electrolysis and waste liquid treatment. The 99.999% high-purity gold is produced directly from the rough gold containing 96% of gold or above through an electrolysis method. The method includes the four main steps of casting of the gold anode plate, solution making, electrolysis and waste liquid treatment, a traditional electrolysis fine method is broken through, the 99.999% gold is obtained through one-time electrolysis, the defects of other refining purification methods are overcome, and the purposes of stable product quality, high gold purity, low loss rate, high raw material adaptability and the like are achieved.