Modification of the known Takanayaga’s model used for calculation of effective elastic properties of dispersed-filled polymers is executed. At the analysis uniaxial stress state of a composite cross-section, the deformation a component is considered. Calculated dependences of the effective Young modulus, shear module and ultimate strength of a composite on volume filler content are obtained. Comparison of these dependences with results of alternative calculation techniques based on initial (not modified) Takanayaga’s model, Mori-Tanaka’s models as well as three-phase model of the dispersion-reinforced composite is performed.