There are plates of compound materia1s manufactured by helix copper wire with various thickness to be applied to the experiment on the electromagnetic wave absorption efficiency in the study. 80th the number and arrange density of the helix copper wire are varied for the experiment. The results show that the best absorption value of 28 .1 dB for electromagnetic wave can be obtained under the combination of helix copper wire size of twine 0.32mm, coil number 15 and layout spacing 1.5 cm.