The invention relates to a heat recovery device and discloses a condensation heat recovery device in a power station. The condensation heat recovery device comprises a steam pipeline (4), a high-temperature waste-water pipeline (6), a cooling water circulation pipeline (1) and a demineralized water pipeline (5), wherein the steam pipeline (4) is connected with a steam engine (41) and a condenser (13); the high-temperature waste-water pipeline (6) is connected with a lithium bromide refrigerating machine (8) and an absorbing heat pump (7); the cooling water circulation pipeline (1) passes through the condenser (13), absorbing heat pump (7) and the lithium bromide refrigerating machine (8) from a cooling circulation water tank (12), and returns to the cooling circulation water tank (12). In the condensation heat recovery device, condensation heat in the power station is recycled for refrigeration by adopting a heat pump technology, so that the steam-type water losing by the power station can be congealed, recovered and recycled, and the condensation heat recovery device has the advantages of high recycling ratio of water resource, energy saving and environmental protection.