Silane-crosslinked polyolefin insulation material for water-tree-resisting cable

The invention relates to a silane-crosslinked polyolefin insulation material for a water-tree-resisting cable. The insulation material should have the crosslinking capability in the natural environment and have the advantages of being high in crosslinking speed and crosslinking degree, simple in processing technology and good in temperature resistance, mechanical performance and water tree resistance. According to the technical scheme, the silane-crosslinked polyolefin insulation material for the water-tree-resisting cable is prepared from, by weight, 90-97 parts of a material A and 3-10 parts of materials B, wherein the material A is matrix resin, and the materials B include 1-20 parts of a crosslinking agent, 0.50-10 parts of an initiator, 1-5 parts of a main antioxidant and 1-3 parts of an auxiliary antioxidant.