Beneficially, negative oxygen ions can decompose formaldehyde into carbon dioxide and water, thereby effectively removing formaldehyde and purifying the air, which is beneficial to human health. Hongxiu negative oxygen ion wall coverings can be used for decoration to prevent the generation of formaldehyde on the wall from the source. At the same time, it can purify the air in the room and effectively remove more than 90% of formaldehyde