The article discusses the idea of a scientific and technical project won in the framework of a competitive application for 2020-2022 for the development of a combined tool adapted to the soil and climatic conditions of the Southern region of Kazakhstan for pre-sowing tillage and sowing seeds in order to increase their yield, reduce the cost of their cultivation, preserve and increase soil fertility. According to the results of the studies carried out at NPCAI LLP, it was found that the experimental sample of a combined unit for pre-sowing tillage and seed sowing is designed for processing row spacing to a depth of 10-12 cm. To ensure a processing depth of 20-25 cm, it is necessary either to increase the diameter of the milling drum, or to almost completely bury a small diameter drum into the soil. The first, as numerous studies show, is impractical due to a sharp increase in the cost of milling power and an increase in the metal consumption of the milling cutter: so, forest and swamp cutters capable of cultivating soil to a depth of more than 20 cm, and having a diameter of 600-800mm milling drum, with a small width of capture, require heavy energy-saturated tractors for their aggregation. In this regard, the combined unit developed within the framework of the project of the Ministry of Education and Science of the Republic of Kazakhstan for pre-sowing tillage and simultaneous sowing of seeds in one pass significantly reduces the level of costs compared to the traditional scheme of pre-sowing soil preparation and sowing. The advantage is to reduce the timing of sowing operations by half, as well as saving fuel by 20-25% and preserve moisture in the soil and reduce energy consumption during sowing.