This paper studies temperature dependences of the conductivity and magnetoconductivity of CoFeB/SiO₂ composite films on a polymer substrate with different total concentrations of metals Co and Fe (x=41-74 at.%) in the temperature range of 2-360 K and in magnetic fields up to 9 T. It has been found that at low concentrations of x=41, 47 at.%, the conductivity and magnetoconductivity of composite films increase with temperature in magnetic fields of 1 and 5 T. At high x=64 and 73 at.%, the conductivity and magnetoconductivity of composite films are weakly dependent on temperature in the range 2-240 K. It is shown that CoFeB/SiO₂ composite films with a minimum concentration of metals x=41 at.%, with a granular structure and a small volume of percolation regions, have maximum negative and positive magnetoconductivity. It is shown that the temperature behavior of the conductivity and magnetoconductivity of composite films with different metal concentrations x is largely determined by the volume ratio of granular and metallic regions. Keywords: composite metal-dielectric films, conductivity, magnetoconductivity, temperature dependence, magnetic field, structure.