The invention discloses a multi-terminal hybrid DC power transmission system. The multi-terminal hybrid DC power transmission system includes a common DC transmitting end and N flexible DC receiving ends, wherein the N is not smaller than 2, the common DC transmitting end and the N flexible DC receiving ends are connected with a DC bus to form a parallel structure, the transmitting power of the common DC transmitting end is equal to the sum of transmitting powers of all the flexible DC receiving ends; when a voltage of the DC bus is a preset normal voltage, the conventional DC transmitting endutilizes a DC power control mode to control the power of the DC bus; each flexible DC receiving end obtains the corresponding distributed power according to a preset respective droop curve, and a voltage control mode is utilized to control the voltage of the DC bus according to the distributed power; when the voltage of the DC bus is not the preset normal voltage, the conventional DC transmittingend utilizes the voltage control mode to control the voltage of the DC bus; each flexible DC receiving end utilizes a DC power control mode to control the power of the DC bus. The multi-terminal hybrid DC power transmission system is advantaged in that stability of the power transmission system can be provided.