 Biomast-derived porous carbon, PC, materials have been widely used for electromagnetic, EM, wave absorption due to their high surface area, low cost, and excellent dielectric loss properties. These materials can be produced using a variety of methods, including pyrolysis, hydrothermal treatment, and chemical activation. Biomast-derived PC materials offer several advantages over traditional carbon materials, including a higher hierarchical textured structure, periodic patterns, and unique nanoarchitecture. Additionally, these materials can be produced in a mild environment, making them attractive for industrial applications. This review discusses the EM wave absorbing characteristics of biomass-derived PC materials, focusing on optimizing structure and designing composition. Finally, the perspective of this research is provided. This article was authored by Huanqin Zhao, Yan Cheng, Wei Lu, and others. We are article.tv, links in the description below.