The paper dealt with the evaluation of mechanical properties of the cylinder wheat straw. rapeseed straw and 50/50 % mixed wheat and rapeseed straw pellet samples. The pellets were made by the granulating machine MGL 200 (Kovonovak). The compressive loading curves of dependencies of stress on strain were realised by the test stand Andilog Stentor 1000 (Andilog Technologies. https://mabelandfoxs.shop/product-category/music-toys/