The invention discloses a high-strength insulation material including a PTT fiber base layer, an insulating layer and a heat insulating layer; the insulating layer comprises the following raw materials in parts by weight: 30 parts of polyolefin, 15 parts of an organosilicon crosslinking agent, 15 parts of silica, 11 parts of silicon hydroxide, 10 parts of magnesium hydroxide, 6 parts of ferric oxide, 5 parts of barium sulfate, 5 parts of magnesium silicate, 3 parts of a talcum powder, 3 parts of a lubricant, 4 parts of an antioxidant, 2 parts of a compatibilizer, and 1 part of an organosilicon levelling agent; the heat insulating layer is a glass fiber layer. The high-strength insulation material has relatively high tensile strength; when acted on by an external force, the high-strength insulation material also has excellent electromagnetic interference resistance; and the high-strength insulation material has the characteristics of low smoke, no toxicity, no halogen, and flame retardancy, and is suitable for insulation layers of various wires and cables.