Core-shell materials are promising broadband electromagnetic(EM)absorption materials since the highly component manipulation performance,interfacial effect etc.Herein,a well-defined core-shell shaped structure constructed by 2-dimensional MOS2 nanosheets-coated porous hollow carbon has been success-fully designed with controlled pore-sizes of the core,adjustable shell content,and structure.By effectively optimizing the parameters for these factors,the as-prepared hierarchical porous hollow C@MoS2 sample enables an ultra-width EM absorption ability(covering 11.4-18.0GHz)at a thickness of only 2.0mm.The detailed contributions of each component and structure on the excellent EM absorption capability have been investigated.These encouraging results indicate that the development of core-shell compos-ites with multiple controllable physical factors is of great significance for the future ultra-wideband electromagnetic absorbers.