High-voltage-resistant thin-wall composite insulation heater for superconducting magnet current lead

The invention discloses a high-voltage-resistant thin-wall composite insulation heater for a superconducting magnet current lead. The high-voltage-resistant thin-wall composite insulation heater comprises a heating unit with a stainless steel shell, a high-thermal-conductivity insulation sleeve, a composite material insulation layer, an insulation cap, an insulation plug and a metal shell. Wherein a grounding wire is led out from the stainless steel shell of the heating unit; the heating unit with the stainless steel shell is wound by a heat-conducting insulating material and then assembled in the high-heat-conducting insulating sleeve; a composite material insulating layer is wound outside the high-thermal-conductivity insulating sleeve; the metal shell wraps the outer side of the composite material insulating layer and is coaxial with the heating unit with the stainless steel shell; the metal shell is provided with a gradual opening structure at the opening end of the heater insulating sleeve; the heater is