Anti-cracking ecological board and preparation method thereof

The invention provides an anti-cracking ecological board and a preparation method thereof. The anti-cracking ecological board is characterized by comprising impregnated bond paper layers, anti-cracking technical veneer layers, formaldehyde-free adhesive layers and base material layers, wherein the two impregnated bond paper layers, the two anti-cracking technical veneer layers and the two formaldehyde-free adhesive layers are arranged on the upper face and the lower face of the base material layer correspondingly, and the formaldehyde-free adhesive layer are of PUR hot melt adhesives or special PVC veneering adhesives. The preparation method of each anti-cracking technical veneer layer comprises the following steps of coating a veneer with a modified waterborne polyurethane adhesive, assembling a blank, performing cold pressing, and slicing, and the preparation method of the modified waterborne polyurethane adhesive comprises the following step of uniformly mixing 100 parts by weight of waterborne polyurethan