The invention relates to a multi-pressure-stage air supply type high-temperature heat pump steam system, and belongs to the field of application expansion of high-temperature heat pump systems. The heat pump steam system is composed of assemblies such as a heat source inlet, a heat source throttle valve, an evaporator, a heat source outlet, an air supply compressor, a main body compressor, a condenser, a heat return control valve group, a first heat regenerator, a subcooler, a primary expansion valve, a primary flash evaporator, and a secondary flash evaporator. Through multi-stage pressure regulation and control in the system, the heating effect and the steam production efficiency of the system are effectively improved, and a high-temperature heat pump circulation module partially adoptsfour-stage pressure comprising low pressure, medium pressure, high pressure and air supply pressure, so that the working state of a circulation refrigerant is effectively controlled, the power consumption of a compressor inside the system is reduced, the heating effect of the system is improved, the steam production efficiency is improved, and the structural optimization of the high-temperature heat pump system and the further development of the field of heat pump steam production are facilitated.