Abstract: With flexible HVDC technology gradually matured, VSC-MTDC transmission system has the features of multiple power supplies and multidrop powered. This makes it as a way of more flexible and efficient transmission got great development. Firstly, this paper make the overview of VSC-MTDC transmission through its topological structure and basic control principle. Then two aspects about the VSC-MTDC transmission system engineering examples and the research status quo at home and abroad are introduced to analyze the VSC-MTDC development present situation. Finally, the application prospects of VSC-MTDC transmission system, such as renewable power integration, power supply of weak power system and island, nonsynchronous connecting of bulk grid, DC power supply and distribution of large city and other areas, are provided.