Multi-energy utilization combined heat and power generation system

The invention relates to a method of a multi-energy utilization combined heat and power generation system. The system comprises a supercritical water gasification reaction device, a supercritical water oxidation reaction device, a photovoltaic power generation device, a solar heat collection device, a power generation device, an oxygen supply device, a heat exchange device, a separation device, a heat storage water tank, a liquid hydrogen storage tank, a purification separator and the like. The supercritical water gasification reaction device is used for completing a sludge supercritical water gasification reaction; a sludge supercritical water gasification reaction product flows through a second steam turbine, steam pushes turbine blades of the second steam turbine to rotate at a high speed to do work, heat energy of the steam is converted into kinetic energy of the turbine blades, a steam turbine main shaft is driven to rotate, and therefore a first generator set is driven to generate electricity; hydrogen