Abstract: Objectives In order to improve the performance of traditional absorbers, a multilayer composite absorber has been designed that integrates resistive film units with lumped inductance-loaded conductive units, achieving wideband low-profile absorption properties. Methods The method employs square ring resistive film units to extend the operational bandwidth, while the miniaturization of the conductive units facilitates a reduction in the minimum operational frequency. Results Simulation results indicate that the designed composite absorber achieves an absorption rate exceeding 90% across the frequency range of 3.22 to 14.63 GHz, with a relative bandwidth expansion of 127.8% and a profile height of only 0.068λL. Conclusions The designed multilayer composite absorber holds significant reference value for broadband low-profile design.