WITH THE DEVELOPMENT OF ELECTRONIC TECHNOLOGY, ELECTROMAGNETIC RADIATION HAS BECOME A NEW POLLUTION SOURCE, WHICH NOT ONLY CAUSES INTERFERENCE IN ELECTRONIC CIRCUITS, BUT ALSO HAS ADVERSE EFFECTS ON PEOPLE’S HEALTH[1]. AT PRESENT, ELECTROMAGNETIC WAVE-ABSORBING MATERIAL (EAM) IS THE MOST EFFICIENT WAY TO REDUCE THE ELECTROMAGNETIC WAVE POLLUTION AND REALIZE THE STEALTH OF TARGET. THE NANOPARTICLES ZINC OXIDE HAS A BROAD APPLICATION IN MICROWAVE ABSORPTION BEHAVIOR [2]. IN THE PRESENT PAPER, FOR THE FIRST TIME, WE HAVE BEEN SYNTHESIZED ZNO NANOCOMPOSITES WITH THE AID OF ZN (OAC)2.2H2O SUCH AS ZINC PRECURSOR IN THE PRESENCE OF MICROWAVE IRRADIATION.NANOCOMPOSITES OF ZNO [ZNO/SIO2 ZNO/FE2O3, ZNO/AL2O3, ZNO/CNT] SYNTHESISED BY MICROWAVE METHOD AND MICROWAVE ABSORPTION BEHAVIOR OF THE AS-PREPARED PRODUCT WAS INVESTIGATED IN DETAIL. BESIDES, THE EFFECT OF PREPARATION PARAMETERS SUCH AS MICROWAVE POWER AND REACTION TIME ON THE MORPHOLOGY AND PARTICLE SIZE OF PRODUCTS WAS STUDIED BY SEM IMAGES.MEASUREMENT RESULTS DEMONSTRATE THAT THE NANOCOMPOSITES ABSORB A CERTAIN AMOUNT OF MICROWAVE ENERGY DUE TO ZNO NANOPARTICLES. HIGHER NANOPARTICLE CONCENTRATION RESULTS IN MORE SIGNIFICANT ABSORPTION EFFECT. WE FIND THAT MORE MICROWAVE ENERGY IS ABSORBED BY THE NANOCOMPOSITE WITH NANOCOMPOSITES THAN IN PURE ZNO/FE2O3 SAMPLES. WE HAVE DISCUSSED THAT THE ABSORPTION MECHANISM IS CAUSED BY CONDUCTIVE LOSSES FOR THE LOW DOPED CASE. THE ASSYNTHESIZED PRODUCTS WERE CHARACTERIZED BY X-RAY DIFFRACTION (XRD), SCANNING ELECTRON MICROSCOPY (SEM), TRANSMISSION ELECTRON MICROSCOPY (TEM), FOURIER TRANSFORM INFRARED SPECTROSCOPY (FT-IR) SPECTROSCOPY, AND EDAX.