Films of supersaturated substitutional CdxPb1−xS (0.03 ≤ x ≤ 0.22) solutions with a B1-type structure based on lead sulfide cubic lattice were produced by chemical bath co-deposition of CdS and PbS with various concentrations of cadmium acetate in the ammonium citrate reaction mixtures. The results of X-ray measurements showed that with increasing cadmium acetate concentration the microstrains increase in the deposited layers and the crystallites have [200] preferred orientation and pronounced volume anisotropy. It is shown that the obtained films are nanostructured. Depending on the solid solution composition, the layers consist of crystallites with average sizes 200 – 1000 nm. These, in turn, are formed from initial nanoparticles with diameter 50 – 70 nm. The conductivity of the films decreases with increasing cadmium-sulfide content. The synthesized films are photosensitive without any special sensitization procedure in the visible and near-infrared spectral ranges. The maximum of spectral characteristic and the long-wave limit of the photo-response of CdxPb1−xS films move smoothly toward the short-wave spectral range from 3.1 to 1.6 µm and from 2.5 to 1.2 µm, respectively, with an increase in the substitution level of lead into cadmium in PbS lattice correspondently.