For countering dual-color guided weapons and improving the spectral matching characteristics with targets of decoys, the improving researches based on Magnesium/Teflon/Viton (MTV) infrared decoy are carried out and new spectral decoys have been developed at home and abroad. The dual-color guided weapons of foreign countries are introduced. Technical systems at home and abroad for spectral decoys are analyzed, which provide references for spectral decoy countermeasure development.