Aiming at the problem of high-frequency DC bus voltage oscillation caused by the constant power negative impedance characteristic of high proportion ship electric propulsion load, a DC bus voltage oscillation suppression method based on impedance reshaping is proposed. The paper analyzes the DC bus voltage oscillation mechanism and key influencing factors under the damping characteristics, and realizes the impedance matching of the system by superimposing the high-frequency component of the DC bus voltage into the cross-axis voltage reference and controlling the impedance remodeling on the load side with a low-pass filter, and constructing a virtual resistor at the resonance frequency to improve the stability margin of the phase angle of the system, inhibit the oscillation of the DC bus voltage, and shorten the time of the dynamic adjustment of the bus voltage.