Abstract: In recent years, it is still a great challenge to realize the high efficiency microwave absorption performance of electromagnetic wave absorbers in the low-frequency band. In this work, the metal oxide Fe₂O₃@CoFe₂O₄ is evenly distributed on Ti₃C₂T_x MXene nanosheets, and the impedance matching for the absorbers is optimized by regulating the content of MXene to construct a conductive network. The results show that the minimum reflection loss (RL_min) of Fe₂O₃@CoFe₂O₄/MXene-3 (FCFM-3) prepared in this study is up to −72.26 dB at the frequency of 3.60 GHz, and simultaneously achieves a RL_min value of −71.66 dB at an ultra-thin thickness of 1.272 mm, which realizes the high-performance electromagnetic wave absorption (EMA) in the low-frequency range, thereby opening up a broad application prospect for absorbers in the civil field.