Polyethylene resin composition, modified high-density polyethylene composite material and preparation method of modified high-density polyethylene composite material

The invention provides a polyethylene composition, a modified high-density polyethylene composite material and a preparation method thereof. The polyethylene composition comprises high-density polyethylene resin, ultra-high molecular weight polyethylene resin, a nano material and a coupling agent. The polyethylene composition disclosed by the invention not only comprises the ultra-high molecular weight polyethylene resin and the high-density polyethylene resin, but also is added with the nano material and the coupling agent, so that the dispersity and compatibility of an ultra-high molecular weight polyethylene resin and high-density polyethylene resin system are greatly improved; and the effect of the ultra-high molecular weight polyethylene can be more effectively exerted in the aspects of processing and final product performance. Therefore, the resin composition can be processed and formed by adopting a conventional plastic processing technology, after the resin composition is subsequently processed into a