［Objective］In this paper，the thermal conductivity of flexible polymers was improved and the flexible polymers were applied to the field of high-performance flexible electronics.［Methods］ Flexible thermal conductive composites were prepared by incorporating highly thermalconductive Ti₃C₂ nanosheets into a low-modulus（0. 8 MPa） polyurethane elastomer，achieving the balance of thermal conductivity and flexibility.［Results］Benefiting from the interfacial interactionsbetween the fluorine and hydroxyl groups on the surface of Ti₃C₂ nanosheets and the polymer matrix， high filler loading of Ti₃C₂ was achieved，and the mechanical properties of composites were significantly enhanced. The tensile toughness of the composite filled with the 7% Ti₃C₂ reached 13. 44 MJ/m³. Simultaneously，the interfacial interactions facilitated the mobility of Ti₃C₂，which made the composites have a 24 h mechanical self-healing efficiency up to 96. 7%，a thermal conductivity of 1. 45 W/（m·K）， and excellent flexibility.［Conclusion］The prepared room-temperature self-healing flexible thermal conductive Ti3C2/polyurethane composites showed promising application potential in the flexible thermal management field.