The invention discloses a heat resistant, wear-resistant and tear-resistant cable sheath. The heat resistant, wear-resistant and tear-resistant cable sheath is prepared, by weight, 20-30 parts of modified phenolic resin, 30-40 parts of epichlorohydrin rubber, 40-50 parts of boron-silicon rubber, 0.4-0.6 part of 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxynonane, 2-4 parts of sulphur, 1-1.5 parts of accelerant MZ, 0.8-1.3 parts of accelerator TMTD, 3-4 parts of zinc oxide, 0.5-1 part of zinc carbonate, 1-2 parts of magnesium oxide, 20-40 parts of talcum powder, 20-25 parts of montmorillonite, 20-30 parts of kaolin, 2-4 parts of jute fiber, 1-1.5 parts of silane coupling agent, 2-5 parts of chlorinated paraffins, 1-2 parts of dimethyl phthalate, 1-2 parts of antioxidant 8PPD and 0.8-1.4 parts of antioxidant BLE. The heat resistant, wear-resistant and tear-resistant cable sheath has excellent wear resistance, tear resistance, weather resistance and flame resistance.