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This disclosure relates to an air compression heat pump system, which forms a first air passage, a second air passage, and a third air passage. The first air passage inputs air from a target temperature-controlled space into a recovery heat exchanger for heat exchange, and then inputs the heat-exchanged air back into the first air passage or discharges it into the external environment. The second air passage sequentially inputs air from the first air passage or from the external environment into a first heat exchanger, a second heat exchanger, and a recovery heat exchanger for heat exchange, and then inputs the heat-exchanged air into the target temperature-controlled space or discharges it into the external environment. The third air passage inputs air from the external environment into the first and second heat exchangers for heat exchange, and then inputs the heat-exchanged air into the target temperature-controlled space or discharges it into the external environment. This disclosure utilizes air from the target temperature-controlled space or the external environment to regulate the temperature of the target temperature-controlled space, resulting in high temperature regulation efficiency, no environmental impact, low operating pressure, and no safety hazards.