The two-beam screw conveyor with a waveform surface is considered a shnek, the mechanism that carries out the rotational motion in the transportation of the product, the design work of its improved construction is carried out and, according to the results of scientific research work, is recommended for production as an important innovation.The work productivity of a two-stroke screw conveyor with a waveform surface depends on the number of its inputs and the coefficient of friction between the material moving on the waveform surfaces and the coprus of the conveyer, the engine pulling forces, and in this way it has an average 15-20% higher work productivity than the usual screw conveyor.