▎ 摘　　要

NOVELTY - Prefabricated bricks with the function of adsorbing formaldehyde and continuously releasing negative ions comprises 25-30 wt.% coarse corundum, 40-50 wt.% fine corundum, 8-15 wt.% alumina fine powder, 8-12 wt.% alumina powder, 2-4 wt.% cattail fiber, 1-3 wt.% dextrin, 1-5 wt.% anion powder. The particle size of the coarse corundum is 0.5-1 millimeter, the particle size of the fine corundum is 0.3-0.5 millimeter, the particle size of the alumina fine powder is 0.02-0.05 millimeter, and the particle size of the alumina fine powder is 0.01-0.02 millimeter. USE - Prefabricated bricks with the function of adsorbing formaldehyde and continuously releasing negative ions. ADVANTAGE - The prefabricated bricks with the function of adsorbing formaldehyde and continuously releasing negative ions absorbs and purify the pollutants in the vehicle such as formaldehyde and improves the air quality in the vehicle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a prefabricated brick with the functions of adsorbing formaldehyde and continuously releasing negative ions, which involves measuring the initial moisture content of the scraps to obtain dry weight of the scraps according to the dry weight of the cattail scraps, the water volume required to adjust the moisture content of the cattail scraps to 40-60%, adding the required amount of water, and mixing to obtain product.