One of the types of motor fuel for motor diesel engines is a mixed fuel obtained by mixing mineral diesel fuel and vegetable oil. The experience of using such a mixed fuel on the MTР-80 tractor shows that the start and heating of the diesel engine must be carried out on mineral diesel fuel, and the operation of the diesel engine in other modes - on mixed fuel The purpose of the research is to develop a diesel power system on mixed fuel for adapting diesel engines of automotive equipment, for example, MTР type tractors to work on viscous vegetable fuel (31.54-34.56cSt). Most of the known systems have disadvantages, which are inherent in not being adapted to work on rapeseed oil, due to its viscosity, as well as contamination of the two-section pumping pump and mixing of contaminated fuels in the mixer, which leads to their contamination with suspended flakes. At the Department of Tractors, Automobiles and Technical Mechanics, the author proposed a diesel power system on mixed fuel, for which RF patent No. 2757356 was obtained. The article presents the device and the technological process of its operation. The execution of technological operations in the diesel power system on the mixed fuel of the MTР tractor type allows to improve the quality of cleaning due to the high viscosity of vegetable fuel (31.54-34.56 cSt) for the operation of the diesel engine. In addition, a multimedia device and a computer are used in the system, which controls the quality of mixing of two types of fuels. Further scientific research should be aimed at the introduction of computer equipment into the power supply system of the MTР type tractor diesel engine.