Paper corner protectors are made by laminating multiple pieces of kraft paper and shaping and pressing them with a corner protector. They mainly come in L and U shapes. After being used for stacking goods, it can strengthen the edge support of packaging materials and protect their overall packaging strength. It belongs to green and environmentally friendly packaging materials and can replace wood recycling and reuse. The global low-carbon and environmental storm has already affected the packaging industry, and the concept of low-carbon packaging has been proposed. The main contents of low-carbon packaging include lightweight packaging, clean production, green products, energy conservation and emission reduction, and replacing wood with paper. Replacing wood with paper is the core of low-carbon packaging. The recycling of waste paper not only reduces the amount of wood used, reduces deforestation, protects the ecological environment, but also saves energy, water, and emissions. According to calculations, using waste paper to produce 1 ton of paper can save 5 cubic meters of wood, 60 cubic meters of water, and 300 kilowatt hours. Paper corner protectors, as a new material for edge, corner, top, and bottom protection packaging, have opened up a new path of "container free packaging". All kinds of goods that only need to protect their edges and corners and do not need to be contained as a whole are greatly benefited and more energy-efficient and environmentally friendly.