MXene,as a rising star of two-dimensional(2D)materials,has been widely applied in fields of micro-wave absorption and electromagnetic shielding to cope with the arrival of the 5G era.However,challenges arise due to the excessively high permittivity and the difficulty of surface modification of few-layered MXenes severely,which infect the microwave absorption performance.Herein,for the first time,a carefully designed and optimized electrostatic self-assembly strategy to fabricate magnetized MXene-rGO/CoNi film was reported.Inside the synthesized composite film,rGO nanosheets decorated with highly dispersed CoNi nanoparticles are interclacted into MXene layers,which effectively suppresses the originally self-restacked of MXene nanosheets,resulting in a reduction of high permittivity.In addition,owing to the strong magnetic coupling between the magnetic FeCo alloy nanoparticles on the rGO substrate,the entire MXene-rGO/CoNi film exhibits a strong magnetic loss capability.Moreover,the local dielectric polarized fields exist at the continuous hetero-interfaces between 2D MXene and rGO further improve the capacity of microwave loss.Hence,the synthesized composite film exhibits excellent microwave absorption property with a maximum reflection loss value of-54.1 dB at 13.28 GHz.The electromagnetic synergy strategy is expected to guide future exploration of high-efficiency MXene-based microwave absorption materials.