To explore the application in smoke interference at the middle and far infrared wave-bands of 3-5 μm and 8-14 μm, the CNT/grapheme/carbon composite was prepared by a liquid phase method. Scanning electron microscopy was used to compare and analyze the microscopic morphology of graphene, carbon nanotubes and composite. The static infrared absorption ability of the three materials was compared and analyzed by Fourier transform infrared spectroscopy. Based on the smoke box experiment, the transmittances of graphene, carbon nanotube and composite for 3-5 μm and 8-14 μm in the middle and far infrared were measured, and the average mass extinction coefficient of the smoke screen was calculated according to the Lambert-Beer law. The results show that after bituminous carbonization, bituminous carbon is used as the skeleton, the smoke-screen interference composite material of the complex network structure formed by carbon nanotube and graphene inhibits the agglomeration of CNT and the stacking phenomenon of graphene, and improves the suspension properties. For the 3-5 μm wave-band, the average transmittance of carbon nanotube, graphene and CNT/grapheme/carbon composite obtained by calculated is about 9%, 10% and 5% respectively. The effective shielding time of the composite increases by about 13% and 21% respectively compared with that of CNT and graphene. The average transmittance at the 8-14 μm infrared wave-band is about 3%, 5% and 4%, respectively and the effective shielding time of the composite is about 28% and 13% higher than that of CNT and graphene. The CNT/grapheme/carbon composites improve the suspension performance and infrared absorption performance of the single carbon material, enhance the interference performance at the middle infrared wave-band, decrease the interference performance at the far infrared wave-band, but the effective interference time is still improved, and its far infrared interference time needs further improvement.