Compensation lead used for thermocouple

The utility model belongs to the compensation lead field and especially relates to a compensation lead used for a thermocouple. In the prior art, the compensation lead frequently generates a heat effect so that the lead is easy to be aging, an anti-interference capability is not strong and so on. By using the compensation lead of the utility model, the above problems can be solved. The compensation lead is provided with a conductor, a fluorinated ethylene propylene (FEP) insulating layer, a metal shielding layer and a FEP sheath. An external part of the conductor is the FEP insulating layer. The external part of the FEP insulating layer is the metal shielding layer. The external part of the metal shielding layer is the FEP sheath. A conductor line core, whose two phases are wrapped with the insulating layers, is arranged in the metal shielding layer. The structure of the compensation lead of the utility model is simple. The metal shielding layer is arranged in the compensation lead so that the anti-interference capability is strong and various kinds of electromagnetic wave interference can be shielded. A discharge damage between the compensation leads is prevented and a service life is prolonged.