Herein, the iron ions doped tin dioxide/reduced graphene oxide (Fe-doped SnO2/RGO) nanocomposites were fabricated by a facile one-step hydrothermal strategy. The structure, composition, micromorphology, and electromagnetic parameters of the obtained nanocomposites were systematically investigated by various analysis techniques. Results revealed that the doping of Fe3t ion had notable effect on the structure and electromagnetic wave (EMW) absorption properties of SnO2/RGO nanocomposites. The as-prepared Fe-doped SnO2/RGO nanocomposites showed the minimum reflection loss (RLmin) of 29.0 dB and effective absorption bandwidth (EAB, RL  10 dB) of 2.7 GHz. Significantly, the dualwaveband absorption characteristic almost covering the C and Ku bands was observed. Besides, the possible EMW absorption mechanism was further proposed. Our results could be helpful for the designing and developing novel graphene-based nanocomposites as the high-performance EMW absorbers.