For infrared imaging guidance missile, special material decoy is a kind of jamming method with higher efficiency cost ratio, which has promising application prospects. For effective jamming, the infrared radiation characteristics of the decoy must meet the requirements. The jamming effectiveness of the decoy is analyzed. The relative testing methods for spectrum characteristics, radiation strength, time-domain characteristics and radiation area are analyzed. Some examples are presented, which provides technical support for the design and evaluation of the special material decoy.