An hydrometallurgical process for the leaching of copper oxide ores that allows the production of cathodes, sheets or copper precipitates, that uses an organic and non contaminant leaching agent, that comprises the following steps: a) the leaching of copper oxide ore, in which, once the ore moved from the mine, the primary, secondary and tertiary grinding are carried out for its classification, after which it is transported to an agglomeration step to be impregnated with a leaching agent that consists of an aqueous solution composed by tricarboxylic acid (C 6 H 8 0 7) in combination with water (H 2 0), in a mixture such that the acidity varies between a pH value of 1.0 and 5.0; the ore impregnated is transported and stocked in leaching piles, which are irrigated with the leaching agent previously specified with a systematic addition that consists in dividing or parcelling the leaching piles in sectors, that are sequentially irrigated with the leaching agent, thus obtaining a concentrated copper citrate; b) electro-deposition of the obtained copper citrate, which is conducted and poured, by means of a controlled flow, to electro-deposition tanks, which contain anodes and cathodes fed with a continuous voltage varying between 0.1 and 7.0 Volts, at a current density varying between 5.0 and 300.0 amperes per square meter; c) recovery of the leaching piles by means of a second ore grinding already worn out from the leaching piles, consisting in a humid grinding wherein the leaching agent previously described is used, using mechanical agitation for a controlled residence time, defined in accordance to the leaching kinetic of each ore, thus generating a pulp that allows the leaching of the ore nucleus, pulp that once filtrated produces additional copper liquor and makes it possible to recover noble metals (gold, silver and platinum), as well as the copper sulphates that could be contained therein. a) the leaching of copper oxide ore, in which, once the ore moved from the mine, the primary, secondary and tertiary grinding are carried out for its classification, after which it is transported to an agglomeration step to be impregnated with a leaching agent that consists of an aqueous solution composed by tricarboxylic acid (C 6 H 8 0 7) in combination with water (H 2 0), in a mixture such that the acidity varies between a pH value of 1.0 and 5.0; the ore impregnated is transported and stocked in leaching piles, which are irrigated with the leaching agent previously specified with a systematic addition that consists in dividing or parcelling the leaching piles in sectors, that are sequentially irrigated with the leaching agent, thus obtaining a concentrated copper citrate; b) electro-deposition of the obtained copper citrate, which is conducted and poured, by means of a controlled flow, to electro-deposition tanks, which contain anodes and cathodes fed with a continuous voltage varying between 0.1 and 7.0 Volts, at a current density varying between 5.0 and 300.0 amperes per square meter; c) recovery of the leaching piles by means of a second ore grinding already worn out from the leaching piles, consisting in a humid grinding wherein the leaching agent previously described is used, using mechanical agitation for a controlled residence time, defined in accordance to the leaching kinetic of each ore, thus generating a pulp that allows the leaching of the ore nucleus, pulp that once filtrated produces additional copper liquor and makes it possible to recover noble metals (gold, silver and platinum), as well as the copper sulphates that could be contained therein.