Melamine resin can be prepared by condensation polymerization with formaldehyde, which can be used in plastic and coating industry, and can also be used as anti-folding and anti-shrinkage treatment agent for textile materials.?Its modified resin can be used as bright color, durable, good hardness of metal coating. It can also be used for strong, heat-resistant decorative sheet, moisture-proof paper and grey leather tanning agent, synthetic fire-proof layer board adhesives, water-proof fixator or hardener, etc. Used as leveling agent of solvent - based polyurethane coating, the effect is particularly good