Disclosed in the present invention is a crosslinked
polyethylene composition having improved processability comprises: 100 parts by weight of
polyethylene, 0.03-5 parts by weight of crosslinking agent, 0.03-5 parts by weight of crosslinking
promoter, and 0.01-1.5 parts by weight of free radical inhibitor, wherein the
polyethylene is a
copolymer and / or homopolymer containing at least 90 wt. % of vinyl and at least one C3-C8 α-alkenyl, and has a density in the range of 0.920-0.970 g / cm3, a melt index in the range of 2.5-17.5 g / 10 min; the crosslinking agent is a
peroxide crosslinking agent; the crosslinking
promoter is an organic substance containing maleimido, (
meth)
acrylate group, and / or allyl, and / or a
polymer containing more than 50% of vinyl; the free radical inhibitor is an organic
antioxidant, a quinhydrone and / or a substituted quinhydrone. The crosslinked polyethylene composition of the present invention has a crosslinking efficiency index of more than 1,100 Nm / g and a δ torque value of more than 10 Nm at the temperature of 200° C., a significantly higher safety process temperature and a significantly improved crosslinking retardation time compared to the conventional crosslinked polyethylene composition, which make it especially be suitable for the production of
rotational molding articles.