Take advantage of its superior theoretical specific capacity, Fe₂O₃ based nanocomposites are promising candidates for sodium ion batteries (SIBs). However, the complicate synthetic procedure hinders their further application. Herein, a facile ethanol diffusion flame synthesis approach is developed to prepare S-doped Fe₂O₃ composite on carbon cloth. The morphology of the Fe₂O₃ can be easily controlled by tuning the composition of the fuel and duration time of the flame treatment. Optimized composite with flake-like structure and heteroatom S-doped Fe₂O₃ (S/Fe₂O₃@CC-2) displayed enhanced electrochemical sodium storage performances. Specifically, sample S/Fe₂O₃@CC-2 maintained a reversible discharge capacity of 464.3 mAh g⁻¹ after 150 cycles at 0.2 A g⁻¹. Besides, at current densities of 0.4, 0.8, 1.6 and 3.2 A g⁻¹, capacities of 393.8, 311.2, 277.5 and 218.9 mAh g⁻¹ could be maintained, respectively. Kinetic analysis implies that S/Fe₂O₃@CC-2 manifested an improved capacitive-controlled sodium storage process. This work will shed light on facile and low-cost approach for the synthesis of high-performance anode materials for SIBs.