Compared with plastic packing, kraft paper packing itself is a very environmentally friendly material, and unlike the plastic which is difficult to degrade for hundreds of years, kraft paper packing made from wood pulp will be degraded by bacteria in a short time even if it is directly discarded in the natural environment, and kraft paper packing is a recyclable renewable resource. Cardboard boxes and paper bags made from kraft paper can be recycled after use. Then kraft paper will be recycled after multiple processes into recycled pulp, into recycled paper, and a recycling process can be recycled, until the physical indicators of recycled pulp can not meet the requirements.