Developing　strong　electromagnetic　(EM)　wave　absorbing　materials　to　solve　the　issue　of　EM　radiation　emanating　from　electronic　devices　in　low-frequency　range　remains　currently　a　great　challenge.　The　majority　of　current　solutions　in　low-frequency　range　are　based　on　magnetic　absorbent.　However,　this　approach　is　constrained　by　the　poor　impedance　matching,　high　production　cost　and　limited　absorption　bandwidth.　Herein,　the　novel　reproducible　cellulose-derived　flawed　graphite　carbon　material　(represented　as　CFGC)　was　prepared　by　chemical　and　following　simple　carbonization　method.　Besides,　the　unique　defect　structure　and　the　mechanism　underlying　microwave　absorption　(MA)　are　elaborated　in　detail.　By　fine-tuning　the　content　of　CFGC,　the　MA　property　is　optimized.　The　minimum　reflection　loss　(RLmin)　of　50　wt%　filling　for　CFGC　is　–42.08　dB　at　4.08　GHz,　showing　an　excellent　MA　property　within　the　low-frequency　range　of　C　bands.　Thus,　the　novel　CFGC　in　this　study　provides　a　new　and　convenient　way　to　solve　low-frequency　EM　pollution.　©　2024