In　multi-layered　wood　materials,　varying　rates　of　dimensional　changes　can　easily　lead　to　cracking,　which　can　have　a　negative　impact　on　their　structure　and　functionality.　This　study　focuses　on　cracking　issues　of　decorated　blockboard　caused　by　moisture　content　changes.　First,　surface　cracks　on　the　decorated　blockboard　were　observed　and　classified　using　optical　microscopy　and　scanning　electron　microscopy　(SEM).　Second,　from　modeling　perspectives,　the　critical　tensile　strength　of　the　surface　of　the　decorated　blockboard　was　predicted　to　be　16.93　MPa,　providing　guidance　for　crack-resistant　modification.　Subsequently,　halloysite　nanotubes　(HNTs)　were　incorporated　into　MF-resin-impregnated　paper,　achieving　a　Grade　5　crack　resistance　for　decorated　blockboard.　The　interaction　between　HNTs　and　MF　resin　forms　a　multiscale　stress-dispersion　system,　as　confirmed　by　Fourier　transform　infrared　spectroscopy　(FTIR)　and　X-ray　diffraction　(XRD),　indicating　hydrogen　and　covalent　bonding　between　HNTs　and　the　MF　resin.　With　a　5%　HNTs　addition,　the　tensile　strength　and　strain　break　of　the　MF-resin-impregnated　paper　reached　36.60　MPa　and　1.12%,　respectively,　representing　increases　of　97.39%　and　60.00%,　respectively,　effectively　preventing　surface　cracking.　This　has　significant　implications　for　improving　the　durability　and　performance　of　decorated　blockboard　in　practical　applications.