Constructing specific microstructures and designing multicomponent composites are regarded as effective approaches to obtaining high-efficiency electromagnetic (EM) wave absorbing materials. Herein, core-shell structured Cu 9 S 5 /N-doped carbon@Co 3 S 4 /N-doped carbon (Cu 9 S 5 /NC@Co 3 S 4 /NC) composites derived from Cu 3 (BTC) 2 @ZIF-67 were synthesized by facile carbonization and sulfidation processes. The Cu 9 S 5 particles are embedded in the interior and surface of the carbon skeleton, and the Co 3 S 4 /NC particles are uniformly distributed on the surface of the carbon skeleton. Compared with Cu 9 S 5 /NC and Co 3 S 4 /NC, the Cu 9 S 5 /NC@Co 3 S 4 /NC composite displays improved impedance matching properties and much better EM wave absorbing properties. The minimum reflection loss (RL min) reaches −41.6 dB at 10.52 GHz with a thickness of 2 mm. In addition, the effective absorption bandwidth (EAB, RL < −10 dB) is 4.08 GHz (12.73–16.81 GHz) with un ultrathin thickness of 1.5 mm. This work offers a facile strategy for synthesizing MOF-derived metal sulfides/carbon composites as EM wave absorption materials with strong absorption properties, a wide absorption bandwidth and ultrathin thickness. [ABSTRACT FROM AUTHOR]