Abstract: In recent years, with the rapid development of nanotechnology, CNT have found extensive applications in diverse fields. Simultaneously, the continuous growth of global energy consumption and the increasingly severe environmental issues have made research on new energy development and energy conversion materials a top priority. Thermoelectric devices leveraging the Seebeck effect and Peltier effect have garnered worldwide attention due to their unique advantages in energy conversion and management. Against this backdrop, integrating thermoelectric devices with human wearable technology to enable intelligent monitoring, temperature regulation, and multifunctional applications has emerged as a research hotspot. This paper reviews recent advances in flexible and wearable thermoelectric materials/devices based on CNT, discusses the feasibility of their application in this field from the perspective of CNT's distinctive physicochemical properties, introduces CNT-based inorganic/organic composite materials and their thermoelectric performance, and finally analyzes future challenges and development trends for CNT-based flexible wearable composite thermoelectric devices. The aim is to promote the widespread practical application of CNT in flexible wearable thermoelectric devices.