The screening characteristics of conventional HC（halogenated organic compound）smoke to visible light and infrared were analyzed. According to the limitation and principle of HC smoke,a series of prescription of anti-infrared smoke agents were determined by a lot of experiments,such as replacing zinc with magnesium,replacing zinc oxide with manganese oxide,adding red phosphorus and other organic compounds containing rich carbon. In a medium-sized smoke chamber,the anti-infrared characteristics of the new smokes were tested. The method of evaluation test was elaborated and the typical thermal images of the infrared object screened by the smoke were given. On the basis of the experiments,two kinds of new and effective anti-infrared smoke agents based upon HC were selected and the corresponding infrared extinction coefficients and the Fourier transform infrared spectra were listed. In contrast with conventional HC smoke,the infrared extinction coefficient of the new smoke has a large increase between 41.86 percent and 78.46 percent in 3～5 microns and 8～14 microns,so that the characteristics of HC smoke were obviously improved,especially in far infrared band.