The utility model discloses a cooling system for a converter station. The cooling system comprises a fan and a power supply control cabinet, wherein the fan is arranged on a sound isolation shield, the power supply control cabinet is used for supplying electricity to the fan, an air inlet of the fan is faces the outer side of the sound isolation shield, and an air outlet of the fan faces the inner side of the sound isolation shield. The cooling system has the advantages that through the technical measure of additionally installing the fan on the sound isolation shield for realizing the forced heat radiation on a converter transformer, the problem that the tripping can be easily caused when the temperature rise of the converter transformer is too high is solved, the heat radiation effect is good, and in addition, the service life of the converter transformer is prolonged. The cooling system is applicable to the converter station.