Abstract: A seawater desalination system includes an evaporation tank, a heat absorption device, a first pipeline, a second pipeline, a condenser, a third pipeline, a water tank and a solar cell panel. A first closed cavity for containing seawater is provided in the evaporation tank. A first and a second through hole are provided in an inner side wall of the first closed cavity. The heat absorption device is provided in the evaporation tank, and a light inlet of the heat absorption device is opposite to the light absorption surface. A first end of the first pipeline is connected to a liquid supply device of seawater, and a second end thereof is connected to the first through hole. A first end of the second pipeline is connected to the second through hole, a second end thereof is connected to the condenser. The condenser is connected to the water tank.