A stretchable carbon nanotube (CNT)/thermoplastic polyurethane (TPU) composite with repeatable segregated structure was developed for electrically driven heater. The segregated conductive networks can be repairable after multiple processing, endowing the CNT/TPU composite with outstanding reliability of electrical heating performance. The steady-state maximum temperature (TMAX) maintains a high retention of 95.2% even for the composite after ten-cycle processing, while the TMAX for the CNT/TPU composite with conventional segregated structure suffers 68.3% decrease after two-cycle processing. Moreover, the repeatable CNT/TPU composite exhibits tensile strength (23.8 MPa) and elongation at break (419.9%), which are nearly doubled in comparison to the conventional one, and it meet practical application as EDHs. The CNT/TPU composite is capable of accommodating repeated heating and a large amount of straining and bending in a completely reversible fashion, thereby proving an outstanding durability. It is clearly testified by application as a wearable electrical heater for human thermal management. Such CNT/TPU composite would facilitate electrically driven heater with segregated networks to massively apply to integrated devices for flexible electronics.