Abstract: Due to their unique structure, coreshell structure composite nanoparticles have many unusual properties especially controllable optical properties, which can be regulated in a broad spectral coverage through changing the structure, components or ratio of core and shell size. These optical properties can be extensively used in optical switches, optical filtration, next generation nanophotonics and improving the properties of infrared materials. This paper reviews current research on the synthesis properties of various types of coreshell nanoparticles.Future prospects are also presented.