Waste heat recycling structure

The invention discloses a waste heat recycling structure which is used for driving a machine tool with a rotating shaft and comprises a heat absorber, a steam generating device and a condenser with a storage container, an evaporation medium is arranged in the storage container, and the heat absorber comprises a first pipeline and a second pipeline. The working steps of the waste heat recycling structure comprise that the pumping device is used for feeding low-heat fluid into the first pipeline, and the liquid evaporation medium in the storage container is fed into the second pipeline; the low-heat fluid in the first pipeline exchanges heat with the evaporation medium in the second pipeline, so that the evaporation medium is boiled to form steam; the gaseous evaporation medium can drive the rotating shaft of the machine tool to rotate and do work; after acting, the temperature-reduced evaporation medium flows back to the condenser to be cooled and condensed into liquid; and the liquid evaporation medium is fed