The invention discloses an improved DC voltage control strategy applicable to a multi-end flexible DC system. The improved DC voltage control strategy comprises the steps of (1) determining a converter station type according to inversion of an active power of a converter station under all working conditions, determining a control mode of the converter station according to the type of the converterstation, and numbering the converter station; (2) determining a DC current allocation coefficient among the converter stations with regard to a receiving-end converter station employing fixed-DC voltage control; and (3) correcting an instruction value of a DC voltage of the converter station, and achieving DC current allocation control of the fixed-DC voltage converter station. The DC voltage instruction valve correction step is added into the converter station with a fixed-DC voltage, indirect control of a DC current and an active power of the converter station can be achieved, the problem of master-slave control unreliability can be solved, the problem that the power cannot be flexibly controlled in DC voltage droop control also can be solved, and the improved DC voltage control strategy has important practical engineering significance.