The invention discloses crosslinked polyethylene, relating to the technical field of macromolecular compound production. The macromolecular compound is prepared from the components of linear low density polyethylene, low density polyethylene, a catalyst, an antioxidant, a silane crosslinker, an initiator and a lubricant. A production process of the crosslinked polyethylene comprises the steps that catalyst masterbatch is pre-prepared from the low density polyethylene, a dibutyl tin dialurate compound and the antioxidant, the catalyst masterbatch, the linear low density polyethylene and the low density polyethylene are subjected to drying treatment, then are transferred with the silane crosslinker, the initiator and the lubricant together to a dynamic reaction machine for vacuumizing, heating and stirring, the mixture is fully reacted and finally enters into a static reaction machine for cooling naturally until the room temperature is reached, and bagging is performed after the inspection is qualified. The crosslinked polyethylene disclosed by the invention has the advantages of simple technology and low cost, and is environment friendly and pollution-free, the requirement of civilized production is met, and the produced crosslinked polyethylene is stable in property, low in production cost, and is suitable for large scale production.