The invention discloses a multi-wire system thermocouple. The multi-wire system thermocouple comprises a plurality of positive thermal electrodes and a plurality of negative thermal electrodes, wherein one of the positive thermal electrodes and one of the negative thermal electrodes work in pairs, and one of the other positive thermal electrodes or the other negative thermal electrodes is selected to be grounded, and the rest of thermal electrodes are suspended; one end of each of the positive thermal electrodes and the negative thermal electrodes is connected together; and the thermocouple also comprises a shock absorber and a discharge comb which sleeve a thermocouple temperature measuring rod. According to the multi-wire system thermocouple of the invention, based on timely discharge and charge transfer, charges can be prevented from being accumulated the temperature measuring component to the greatest extent, and at the same time, charge generation quantity can be decreased from the source, and the interference of interference charges on temperature measuring potential can be eliminated from a plurality of channels.