Abstract: In order to obtain attenuation data of several wavebands permeating smog of solid smoke agent，the smog transmittances of 3 smoke agents in 0.4 μm~1 μm visible light waveband，1.06 μm laser wavelength，10.6 μm laser wavelength and 8 μm~14 μm far-infrared waveband were tested by the aid of a smokebox，through which we got the mass extinction coefficients of 3 kinds of interference agent smog in several specified wavebands, and acquired 3 groups of transmittance curves in 4 kinds of wavebands permeating different smog densities with different interference smoke agents. The tested data indicates that the transmittance of 10.6 μm laser is twice as much as that of the 1.06 μm laser in the condition of 4.8 m smog passage and the smog density of smoke agent less than 1.094 7 g/m3 ; And the infrared camera functions are much better than the silicon charge coulped device( CCD) camera.