Thermal radiation is an important aspect of experimental physics research.A spectrally selectivethermal radiation souree was fabricated based on metal-dielectrie-metal “ sandwich "metamaterial. "hemanufactured metamaterial source exhibited desirable thermal radiation feature according to experimental results , which revealed that thermal radiation energy has been foeused within a narrowband around the designedwavelength of 9.03 um with peak emissivity up to 98.09 and bandwidth of 1.58 μm.