Abstract: With the development and improvement of energy strategies, VSC-MTDC has become an important technology to address issues in renewable power integration. In this paper, VSC-MTDC technology and corresponding application cases are presented in details. Based on analysis of demands in renewable power integration and island power supply, the application prospects of VSC-MTDC, such as renewable power integration, power supply of island and drilling platform, nonsynchronous connecting of bulk grid, and power supply and distribution of large city, are provided. The research progress of VSC-MTDC is analysized in terms of topology, control strategy, mathematic model and simulation analysis as well as operation characteristic, and proposals are further proposed respectively.