The invention relates to the field of energy conservation, in particular to an afterheat recycling method and an afterheat recycling device for steam driving type tandem type heat pumps. The device comprises a small steam turbine, a compression type heat pump and an absorption type heat pump, and is characterized in that the compression type heat pump and the absorption type heat pump adopt a parallel structure, wherein the small steam turbine is connected with a compressor of the compression type heat pump and the absorption type heat pump respectively; a first low-temperature water inlet, a first cooling low-temperature water outlet, a first high-temperature water inlet and a first heating high-temperature water outlet are formed in the absorption type heat pump; a second low-temperature water inlet, a second cooling low-temperature water outlet, a second high-temperature water inlet and a second heating high-temperature water outlet are formed in the compression type heat pump. According to the device, condensation heat, released in a process of converting gas phase into liquid phase, of driving steam is used for driving the small steam turbine and the absorption type heat pump in sequence; the compression type heat pump and the absorption type heat pump are connected in parallel and perform heat exchange at the same time, so that the device is higher in integrated energy efficiency ratio.