The utilization of carbon fiber reinforced epoxy resin (CFRE) has gained remarkable prominence across diverse industrial domains due to its excellent rigidity, hardness, and corrosion resistance. However, the intricate three-dimensional network crosslinked structure of thermosetting epoxy resin engenders formidable challenge in the realm of material recycling for further value-added products. In this paper, solid-state shear milling (S3M) technology is applied to removal of the epoxy resin matrix enshrouching the carbon fiber surface, facilitating the subsequent fabrication of value-added PA/WFRE/BN composite through the incorporation of boron nitride (BN). The BN engenders a progressive connection with the high aspect ratio carbon fiber and established cohesive thermal conductivity network. Specifically, the thermal conductivity of PA/ WFRE/BN-20 reached 1.24 W/mK escalated by an impressive 375% vs pristine polyamide (PA), and resistivity is higher than 10 10 Ω•cm. An excellent thermal management performance can also be noticed for PA/WFRE/BN-20 composite, whose surface temperature drops from 60 to 20 °C in only 55 s, which is much shorter than PA/BN-20 (almost 100 s). Furthermore, the tensile and flexural strengths of the composite reached as high as 88.6 and 127.7 MPa, which are 76% and 93% higher than pristine PA. In summation, this work offered a facile pathway for the fabrication of value-added thermal management composites from waste carbon fiber reinforced epoxy and showed a promising strategy for the upgrade recycling of thermosetting resins.