For obtaining a good millimeter wave smoke materials,the attenuation performance to 3 mm and 8 mm wave of JF-150 expansive graphite was studied. Furthermore,the anti-IR/millimeter wave smoke composition with JF-150 expansive graphite was designed. The attenuation performance of the smoke formed by mentioned composition was also studied by the IR thermal image set and millimeter wave radiometer. The results show that the unilateralism maximum attenuation to 3 mm and 8 mm wave of expansive graphite are 17.0 dB and 16.6 dB,respectively,and better than that of the aluminum foil; the unilateralism maximum attenuation to 3 mm and 8 mm wave of 60 g expansive graphite are higher than 10 dB,the interference time is about 20 s. The expansive graphite is a good material for producing the anti-IR/millimeter wave smoke composition.