Synthesis and characterization of $({\mathrm{Ba}}_{\text{0.2}}{\mathrm{La}}_{\text{0.8}}){\mathrm{Fe}}_{\text{0.2}}{\mathrm{Mn}}_{\text{0.4}}{\mathrm{Ti}}_{\text{0.4}}{\mathrm{O}}_3$ absorbing material by mechanical alloying process has been performed. The absorbing material was prepared by oxide materials, namely ${\mathrm{BaCO}}_3$, ${\mathrm{La}}_2{\mathrm{O}}_3$, ${\mathrm{TiO}}_2$, ${\mathrm{Fe}}_2{\mathrm{O}}_3$, and ${\mathrm{MnCO}}_3$. The mixture was milled for 10 h and then sintered at a temperature of 1000 ° C for 10 h. The refinement results of x-ray diffraction pattern of lanthanum manganite substituted with barium showed that the sample consisted of two phases, namely, ${\mathrm{La}}_{\text{0.9125}}{\mathrm{MnO}}_3$ phase which has a structure monoclinic (I12/a1) with lattice parameters a = 5.527(1) Å, b = 5.572(1) Å and c = 7.810(1) Å, α = γ = 90° and β = 89.88(5)°, the unit cell volume of V = 240.57(8) ų, and the atomic density of ρ = 6.238 gr.cm⁻³. The microstructure analyses showed that the particle shapes was polygonal with the varied particle sizes of 1 ∼ 3 μm distributed homogeneously on the surface of the samples. The results of the electromagnetic wave absorption curve analysis by using a vector network analyzer (VNA) showed that the sample can absorb microwaves in the frequency range of 8-15 GHz with a very wide absorption bandwidth. It indicates that the as prepared absorber presents potential absorbing property in X and Ku-band. We concluded that the $({\mathrm{Ba}}_{\text{0.2}}{\mathrm{La}}_{\text{0.8}}){\mathrm{Fe}}_{\text{0.2}}{\mathrm{Mn}}_{\text{0.4}}{\mathrm{Ti}}_{\text{0.4}}{\mathrm{O}}_3$ material can be applied as a candidate absorber material of microwaves or electromagnetic wave.