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In order to study a new microwave absorbing ability, magnetic materials of BaFe12O19 and BaFe10CoZnO19 were synthesized by ceramic method. Microwave absorbing ability of multi nanolayer absorbers, composed of BaFe12O19 and and BaFe10CoZnO19 with a layer thickness of 25 nm, 50 nm, 75 nm, 100 nm, 200, nm, 300 nm, 500 nm and 1000 nm were characterized at room temperature using vector network analyzer (VNA) Rohde‐Schwarz ZVA 67 to measure the reflected signal (S11) and transmitted signal (S21) for 7 – 13 GHz frequencies. Reflection loss (RL) of multi nanolayer magnetic materials were calculated and simulated using the transmit line theory. the microwave absorption abilites were enhanced for multilayer structure due to the combination of nano layers. The optimal absorption ability was achieved with less than − 30 dB (i.e. 99.9 % absorption) when thicknesses of layer were less than 500 nm.