Steam-water heat exchanger

The utility model provides a steam-water heat exchanger which comprises a heat exchanger main body, a cold water inlet and a hot water inlet, and is realized by arranging an exit adapter tube butted with a boiler drum at the lower part of the heat exchanger main body. As the exit adapter is arranged to integrate a steam inlet and a condensed water outlet, steam sent by the boiler drum enters the heat exchanger from the adapter tube to heat the water, and condensed water flows back to the boiler drum along the wall of the adapter tube so as to be directly recycled. The steam-water heat exchanger has the advantages of having simple structure, smart concept, stable performance, convenient use and the like and saving materials.