The utility model discloses a multistage flash condensation recovery device, including flash tank, cooling water nozzle, emptying pipeline, circulation water leg cover and combination muffler, emptying pipeline's one end setting is at the top of flash tank set up the cooling water valve on the lateral wall of flash tank, the cooling water valve is connected with the cooling water nozzle who installs in the flash tank, circulating water jacket sleeve sets up on emptying pipeline, the combination muffler is connected at the emptying pipeline other end. The utility model discloses furthest has reduced lime set consumption and waste, and it is fast to retrieve the condensate, fundamentally solves the frozen serious potential safety hazard problem of bringing in week in winter ring edge border.