<p>The article describes a method for producing a polymer composite material based on an epoxy matrix. Complex mechanical and technological tests of the composite were carried out. It is assumed that the constituent components must conform and not dissolve or absorb into each other. Composite materials should have the properties that cannot be separated om the components. Only under these conditions will they be able to be used. Polymer materials also belong to composites, since in addition to the main component (polymer), various llers, dyes and other substances are used. Polymers are substances consisting of an elementary unit in the same structure as macromolecular ones. e chemical composition of the polymer is expressed by this structural unit, and the number of compounds in the macromolecular chain is called the degree of polymerization. A complex mechanical testing of composite materials based on epoxy matrix with di erent llers. It was found that the samples of polymer composite materials, reinforced together with inatable co on and berglass bers, have the highest mechanical and technological properties. Based on the analysis of mechanical and technological properties, it is recommended to make linings of passenger carriages made om polymeric composite materials on the basis of the epoxy matrix reinforced with co on and berglass.</p>