The paper protection corner is also known as paper corner or corner paperboard, edge board, corner paper, and paper angle steel. The yarn tube paper and cow paperboard are shaped by a complete set of corner protectors, and the two end surfaces are smooth and flat with no obvious burrs. They are vertical and can replace the wood 10 for recycling. It is an ideal new type of green packaging material. The paper protection corner protects the edge of the product, prevents the packing from damaging the outer packaging carton on the product, and prevents the edge corners of household appliances, furniture, or other products from being bumped, and plays a certain role in compressive reinforcement. Paper protection angle is widely used in transportation, warehousing and logistics industries to help product packaging, reinforcement trays, furniture edge collision avoidance, non-woven products packaging, tile packaging, building materials, packaging and other suitable for all industries.