The object of research is the conveyor, which is the mechanism of the header for two–phase harvesting by batch method. The aim of the research is to develop the design and technological process ofthe roll portion header, the most suitable for the conditions of arid climate with the justification ofits main operating parameters. In the conditions of the steppe zone of the southern Urals, a separatemethod of harvesting grain crops is more preferable. The analysis of the structures windrowers allowed todevelop a portion of the header. The technological process as a portion of the header includes two phases — mowing and subsequent accumulation of the grain mass on the conveyor, and then upload. The unloaded portions are joined with the stacked in the previous passage – this is how the roll strip is formed. This option of laying the roll can reduce the number of passes in the selection of about 4–5 times in comparison with the basic technology. This allows you to reduce the cost of selection and reduce the impact of heavy machinery on the soil. A special role in the work of the header plays a conveyor. It is established that the thickness of the layer of stems on the Reaper conveyor depends on theworking length of the conveyor and the speed of movement of the unit on the field, the density and diameter of the stalk, the density of laying on the conveyor.