<p>Due to the strong structural design, light weight and high stability of carbon materials, carbon-based composite materials have attracted much attention in the field of absorbing waves. In this work, hollow carbon microspheres were constructed by the template method, and combined with TiO₂ particles, C@TiO₂ composite hollow microspheres were successfully prepared. This not only retains the excellent properties of carbon-based materials, but also optimizes the absorbing wave performance by constructing a rough surface and hollow structure. As a template, SiO₂ was obtained by hydrolysis of tetrapropoxy-silane (TPOS), the phenolic resin undergone in-situ polymerization on the surface of the template, and then the hollow carbon microspheres (HCMS) with a certain shell thickness were prepared by etching and sintering at high temperature. Particle coated core-shell HCMS@TiO₂ composites were prepared by subsequent hydrolysis of tetrabutyl titanate (TBT). The effect of the addition amount of TBT on its morphology and absorption performance was evaluated. When the filler ratio is 20wt% and the thickness is 2&#xa0;mm, the lowest reflection loss (RL_min) and effective absorption bandwidth (EAB) were up to -48.93dB and 4.4&#xa0;GHz respectively. TiO₂ has a low dielectric constant, which can effectively adjust the overall dielectric value of carbon materials, optimize impedance matching, and generate new heterogeneous interfaces, thus improving the wave absorption performance of the composites. In addition, the low density and hollow mesoporous characteristics of the hollow carbon microspheres are not damaged. The method has the advantages of low cost, controllable structure, uniform dispersion of coated particles, etc. It is a potential electromagnetic wave absorbing material that conforms to the characteristics of “wide, strong, light and thin”.</p>