This paper is about how to improve camouflage net protecting effect from radar detection, by introducing the layer-composite technology of radar-absorbing materials and optimizing radar-absorbing structure. In the layer-composite technology, materials choices and parameters setting, especially the relation between the content of Phosphor and radar absorption on the Ni-P electroless plating technology, are mentioned. Moreover, four superficial structures, are compared. A conclusion is got that jungle-two structure can do the best to attenuate 5.7 dB over the whole frequency ranges. In addition, according to the theory of the interaction of electromagnetic wave, the study applies physical optics to the RCS computation for optimizing technological parameters and structure by the computing software.