Melamine resin can be obtained by condensation polymerization with formaldehyde, which can be used in the plastics and coating industries, and can also be used as an anti-folding and anti-shrinking treatment agent for textiles. Its modified resin can be used as a metal coating with bright color, durability and good hardness. It can also be used for strong, heat-resistant decorative veneer, moisture-proof paper and gray leather tanning agent, adhesive for synthetic fireproof laminates, fixative or hardener for waterproofing agents, etc.