The invention discloses a double-cooling-medium condenser. The double-cooling-medium condenser comprises a condenser body. A condenser pipe bundle is arranged in the condenser body. An air cooling area pipe bundle and a plurality of sudden cooling area pipe bundles are arranged in the condenser pipe bundle. The condenser pipe bundle is communicated with a water inlet chamber and a water outlet chamber. A first cooling medium circulates in the water inlet chamber and the water outlet chamber. The air cooling area pipe bundle and the sudden cooling area pipe bundles are all communicated with a front small water chamber and a rear small water chamber. A second cooling medium circulates in the front small water chamber and the rear small water chamber. Due to the adoption of the condenser double-cooling-medium technology, the overall heat exchange intensity of the condenser is improved, vacuum of the condenser is improved, loads of a suction system are reduced, the suction effect of the suction system is improved, and therefore, efficiency of steam power circulation is improved.