The invention relates to a nuclear power floating platform and a novel voltage stabilizer capable of inhibiting a sloshing phenomenon. The voltage stabilizer comprises a cylinder body, an upper end socket and a lower end socket which are used for capping upper and lower ends of the cylinder body, wherein an anti-sloshing isolation device is arranged on the lower end socket toward the upper end of the cylinder body, and is used for partitioning and isolating the water space at the lower end of the cylinder body; the anti-sloshing isolation device is used for partitioning the water space of the large-diameter cylinder body into a plurality of spaces having relatively small sections along the axial direction as containers, the small spaces have relatively small section sizes, and cannot easily slosh in an isolation plate, so that the sloshing phenomenon in a voltage stabilizer can be effectively inhibited; and if the small cylindrical space partitioned by the isolation plate is finer, the sloshing effect is weaker. The voltage stabilizer enables a nuclear reactor system to continuously run in a worse environment, and does not have trip or safety injection signal false start due to liquid sloshing in the voltage stabilizer, so that the environment applicability of the nuclear reactor system can be enhanced, and the safety and economy of the nuclear reactor system can be improved.