The invention discloses a formaldehyde-removing air purification filter element based on an inclined hole aluminum honeycomb board, which comprises a formaldehyde-removing coating and an aluminum honeycomb board. The aluminum honeycomb core is a plate-like body composed of a hexagonal hole, and the Angle between the hexagonal hole and the front vertical direction of the plate body is 5? 20 degrees; The formaldehyde removal coating is prepared by coating the formaldehyde removal coating on the inner surface of the hexagonal pore and drying and curing. The formaldehyde removal coating is a mixture, and the mixture components include activated carbon, calcium peroxide, calcium oxide, manganese dioxide, potassium carbonate and adhesive. A preparation method of the invention is also disclosed. The formaldehyde removal air purification filter based on the aluminum honeycomb panel provided by the invention can achieve a formaldehyde removal rate of 93% in 2.5 minutes, a formaldehyde removal rate of 100% in 10 minutes, and a wind resistance of 98% lower than that of the granular formaldehyde removal filler. The invention has the characteristics of high formaldehyde purification efficiency, high temperature resistance, low air resistance, corrosion resistance, long service life, etc.
