In this paper, a novel freestanding core‐branch negative and positive electrode material through integrating trim aligned Fe2O3 nanoneedle arrays (Fe2O3 NNAs) is first proposed with typical mesoporous structures and NiCo2O4/Ni(OH)2 hybrid nanosheet arrays (NiCo2O4/Ni(OH)2 HNAs) on SiC nanowire (SiC NW) skeletons with outstanding resistance to oxidation and corrosion, good conductivity, and large‐specific surface area. The original built SiC NWs@Fe2O3 NNAs is validated to be a highly capacitive negative electrode (721 F g−1 at 2 A g−1, i.e., 1 F cm−2 at 2.8 mA cm−2), matching well with the similarly constructed SiC NWs@NiCo2O4/Ni(OH)2 HNAs positive electrode (2580 F g−1 at 4 A g−1, i.e., 3.12 F cm−2 at 4.8 mA cm−2). Contributed by the uniquely engineered electrodes, a high‐performance asymmetric supercapacitor (ASC) is developed, which can exhibit a maximum energy density of 103 W h kg−1 at a power density of 3.5 kW kg−1, even when charging the device within 6.5 s, the energy density can still maintain as high as 45 W h kg−1 at 26.1 kW kg−1, and the ASC manifests long cycling lifespan with 86.6% capacitance retention even after 5000 cycles. This pioneering work not only offers an attractive strategy for rational construction of high‐performance SiC NW‐based nanostructured electrodes materials, but also provides a fresh route for manufacturing next‐generation high‐energy storage and conversion systems. An asymmetric supercapacitor device based on the advanced Fe2O3 nanoneedle arrays with typical mesoporous structures and NiCo2O4/Ni(OH)2 hybrid nanosheet arrays‐decorated SiC nanowire supporters with versatile advantages on carbon cloth as negative and positive electrodes is designed successfully, and the assembled device can exhibit large‐specific capacitance, high‐energy density, and excellent cycling stability.