Abstract: According to the requirement of stealth performance for the precision guided weapon, infrared and ultraviolet (IR/UV) characteristic signal of the HTPB composite propellant was measured based on a simplified rocket motor, and the IR/UV extinction ability of ferrocene was compared. It was analyzed that the nozzle temperature of motor is influenced by the ferrocene. The results show that the ferrocene is converted rapidly from its solid state to its gaseous state by primary power of a pyrotechnical composite based on nitrate of potash, sulphur, and phenolic resin, and a sheet of aerosol film is formed. The aerosol film can absorb infrared and ultraviolet from the flame of propellants, and the attenuation ratio may exceed 50% in 710-3 500 cm-1 waveband when the content of ferrocene is 30%. But it will increase the infrared radiation intensity of flame of the HTPB composite propellant when the content of ferrocene exceeds 50%.