Abstract: The sorting technology of waste plastics is the important process to achieve the efficient recycling of waste plastics, and is also a key step to realize homogeneous waste plastics as raw materials and ensure the stable operation of the subsequent processes and the stable quality of the products. The research progress on the sorting technology of waste plastics was introduced, with emphasis on the application progress and development trend of sorting technology according to density, spectrum electrostatics, and solubility.The future developing tread is proposed,including integrated intelligent sorting system,improving the sorting technology by sovlent,and developing gradient sorting technology. It is of great significance to research and develop the sorting technology of waste plastics and improve the utilization of waste plastics.

Key words: waste plastics, sorting technology, pretreatment technology, recycling