The invention relates to a preparation method of a waste plastic composite material modified by non-metallic powder of waste circuit boards. The invention carries out hydrothermal activation treatment on dried non-metallic powder of waste circuit boards to obtain activated non-metallic powder of waste circuit boards, and then mixes the activated non-metallic powder with recycled waste plastic materials for extrusion molding in a parallel co-rotating twin-screw extruder to obtain a waste plastic composite material filled and modified by non-metallic powder of waste circuit boards. The invention has a simple process. Hydrothermal activation treatment of non-metallic powder of waste circuit boards can break chemical bonds of the powder, generate new activation sites and active groups, thereby improving the interfacial bonding performance between the non-metallic powder and the resin matrix and enhancing the overall performance of the composite material. Using non-metallic powder of waste circuit boards and recycled waste plastic materials as raw materials, the invention realizes resource utilization of waste materials and reduces material costs, with significant economic and social significance.

Area Code: CN

Application Number: CN201110358001.X