The invention relates to a crosslinking polyethylene composite material and a preparation method thereof, in particular to a high-abrasion-resistant corrosion-resistant inorganic particle crosslinking polyethylene composite material and a preparation method thereof. The high-abrasion-resistant corrosion-resistant inorganic particle crosslinking polyethylene composite material consists of a component A and a component B, wherein the component A comprises 100 percent of linear low-concentration polyethylene, 10-30 percent of polyethylene modifying agent and 0.1-5 percent of antioxygen; the component B comprises 30-70 percent of high-concentration polyethylene, 70-30 percent of linear low-concentration polyethylene, 10-30 percent of ultrafine Al2O3, 5-15 percent of nanometer MoS2, 0.1-1.0 percent of scattered lubricant, 0.2-0.5 percent of surface treating agent, 0.1-1 percent of cross-linking agent and 0.2-1.5 percent of auxiliary crosslinking agent. The basic resin adopted in the invention is a composite material of high-concentration polyethylene and linear low-concentration polyethylene, the invention ensures the sufficient crosslinking effect and reduces the crystallinity to the maximum extent so that the crosslinking material has excellent rigidity and hardness and excellent chemical corrosion resistance and barrier property.