Microwave absorbing materials refer to a class of materials that can absorb or weaken the electromagnetic wave energy on their surface, thereby reducing electromagnetic interference. In recent years, various high-entropy ceramic absorbing materials have emerged in the exploration of absorbing materials. These materials exhibit a better absorbing performance than single-component materials due to their thermodynamic high-entropy effect, lattice distortion effect in structure, hysteresis diffusion effect in kinetics, and synergistic enhancement effect of components. This review summarized recent research results on the component design, preparation, and absorbing performance relationship of different types of high-entropy absorbing ceramics, and analyzed the influence of high-entropy effect on its absorbing performance. In addition, this review also summarized the corresponding scientific issues and challenges in research work and prospected the future development directions of high-entropy absorbing ceramics.