Comprehensive-utilization power generation device for livestock excrements

The invention provides a comprehensive-utilization power generation device for livestock excrements. The comprehensive-utilization power generation device comprises a heat insulating barrel, a heat source, a steam device, a power generation assembly, a first heat exchanger, a first guide mechanism, a heat pump unit and a heat transfer device, wherein the heat source comprises a combustion device and a biogas digester; the steam device comprises a steam tank and a heat conduction pipe; the combustion device is used for heating fluid in the heat insulating barrel, so that heated fluid rushes into the power generation assembly and drives the power generation assembly to generate power; a working medium is stored in the first heat exchanger so as to be used for absorbing heat of the fluid which rushes into the power generation assembly; the first guide mechanism is used for feeding the working medium into the heat pump unit, and then feeding back the working medium into the first heat exchanger; the heat pump uni