Method for recycling waste plastic of paper mill

The invention relates to a method for recycling waste plastic of a paper mill. The method includes the following processes of firstly, breaking, secondly, washing and classification, thirdly, lime emulsion treatment, fourthly, solvent re-treatment, fifthly, paint release, and sixthly pelletization, wherein in the first process, the waste plastic of the paper mill is smashed; in the second process, the smashed waste plastic of the paper mill is washed through a cyclone hydraulic separator to obtain polyolefin plastic; in the third process, the obtained polyolefin plastic is subjected to lime emulsion treatment; in the fourth process, the polyolefin plastic subjected to lime emulsion treatment is separated and purified through a solvent; in the fifth process, the polyolefin plastic retreated through the solvent is soaked in a paint release agent, so that paint is released; and in the sixth process, the polyolefin plastic subjected to paint release treatment is fused, extruded and pelletized, so that milky aggregate is obtained. By the adoption of the method for recycling the waste plastic, a main material adopted in the method originates from the waste plastic of the paper mill, the environmental pollution problem caused by incineration and landfill of the waste plastic is solved, and the method accords with the environment-friendly sustainable development route.