The present disclosure relates to a method and a system for purifying an aqueous hydrogen peroxide solution. According to the present disclosure, it is possible to provide a method and a system for purifying an aqueous hydrogen peroxide solution, which may achieve the purity required in fine chemical fields such as the semiconductor industry field by preventing layer separation of a mixed ion-exchange resin consisting of a cation-exchange resin and an anion-exchange resin and reducing the leaching of ions from the resin during a purification process.

The present invention relates to a method for purifying hydrogen peroxide, and more particularly, to a method including purifying a crude product of hydrogen peroxide using a primary purification system, and purifying a primarily purified hydrogen peroxide solution using a secondary purification system. One of the primary purification system and the secondary purification system includes an electrodeionization system, and the other one of the primary purification system and the secondary purification system includes at least one from among a distillation system, a resin system, a reverse osmosis system, and a combination system thereof.

The present invention relates to a new process configuration for the purification of an aqueous hydrogen peroxide (H.sub.2O.sub.2) solution containing organic impurities.