The shore power voltage stabilizer is an important equipment of the ship's power system and a hub connecting shore power, ship power and power-consuming equipment. The shore power voltage stabilizer can stabilize the input shore power with large voltage fluctuations and distorted waveforms through a compensation transformer, and output a power supply with stable voltage, complete waveform and reliable quality for use by equipment on board. The shore power voltage stabilizer has the functions of automatic voltage increase and decrease, manual voltage increase and decrease, input overvoltage alarm, input low voltage alarm, output overvoltage alarm, output low voltage alarm, overcurrent alarm, etc.; it has the characteristics of small size, strong short-term overload capacity and reliable power supply.