The utility model discloses a heat recovery device of a steam turbine bearing lubricating oil system, and belongs to the field of heat recovery devices. The device comprises a bearing lubricating oil return pipeline and a steam condenser, wherein the bearing lubricating oil return pipeline is provided with a lubricating oil heat recoverer; the lubricating oil inlet and outlet of the lubricating oil heat recoverer are communicated with the bearing lubricating oil return pipeline, and the cooling water inlet and outlet of the lubricating oil heat recoverer are communicated with a condensation water main pipe at the hot well outlet of the steam condenser. The heat recovery device of the steam turbine bearing lubricating oil system provided by the utility model has the beneficial effect that original equipment of the steam turbine is fully utilized, equipment modification is small, discarded heat can be simply and effectively reused, the heat economy of the unit is improved, standard coal consumption of the unit is reduced, and energy conservation and emission reduction and environmental friendliness are realized.