The invention relates to a VSC-HVDC configuration method and device for power supply division interconnection. The method comprises: according to a power supply margin of a power supply division, determining VSC-HVDC sending-end and receiving-end power grids; determining upper and lower limits of a VSC-HVDC rated power, and determining constraint conditions for the VSC-HVDC rated power by using the upper and lower limits of the VSC-HVDC rated power; determining VSC-HVDC terminal buses of the VSC-HVDC sending-end and receiving-end power grids respectively; and conducting safety stability check for the VSC-HVDC sending-end and receiving-end power grids after the VSC-HVDC grid integration. In the technical scheme of the invention, through the VSC-HVDC connection of two power supply divisions, the generation of an electromagnetic looped network can be avoided, and overproof short-circuit current can be restrained; meanwhile if a fault appears in one division, active power and reactive power supports are provided through VSC-HVDC power control, so the fault division is supported by another division.