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Implementation of a digital twin on the example of a production line for the assembly of small spacecraft is considered in the article. The case of using digital twins for planning, controlling and maintaining the life cycle of production equipment presented in the article is of interest in the perspective of the active introduction of robotics into technological processes. In order to control the digital twin, proprietary software is used that provides not only visualization, but also collision control and geometry accuracy. The software platform is able to combine both several robots from different manufacturers, as well as equipment of its own production using a universal communication protocol. The use of a digital twin in a system of several robots allows one to design more versatile workplaces and assembly lines and adjust their workload depending on the range and the required quantity of manufactured products. The requirements for the functionality of the digital twin, technical aspects of implementation, including hardware and software, further possibilities for expanding the functionality and development of the proposed platform are analyzed in the article. [ABSTRACT FROM AUTHOR]