The invention discloses a vortex pump with a stable exhaust function, a vortex-compressor and a vehicle-mounted heat pump air-conditioning system. The heat pump air-conditioning system comprises a compressor, a vehicle-mounted four-way reversing valve, a first parallel flow heat exchanger and a second parallel flow heat exchanger which form a circulation loop, the circulation loop is internally provided with a refrigerating fluid, an outlet of the compressor, the vehicle-mounted four-way reversing valve, the first parallel flow heat exchanger, an expansion valve, the second parallel flow heatexchanger, the vehicle-mounted four-way reversing valve and an inlet of the compressor form a refrigerating mode loop; the outlet of the compressor, the vehicle-mounted four-way reversing valve, the second parallel flow heat exchanger, the expansion valve, the first parallel flow heat exchanger, the vehicle-mounted four-way reversing valve and the inlet of the compressor form a heating mode loop.The heat pump air-conditioning system has the advantages that the electric vortex-compressor for a heat pump is adopted, multiple exhaust holes are formed additionally to enhance the exhaust stability, and the functions of an in-vehicle heat exchanger and ex-vehicle heat exchanger can be interchanged through four-way valves to adapt to switching between a refrigerating mode and a heating mode.