The invention discloses a heat pump assistant. The heat pump assistant comprises an inner machine device and an outer machine device which is fixed to a heat pump outer shell, wherein the outer machine device and the inner machine device are connected through a pipeline; the outer machine device comprises a water pipe, a nozzle, a first temperature sensor, a second temperature sensor and an electric tracing strip; the inner machine device comprises a power source module, a communication control module, a water inlet connector, a decompressing valve, an electromagnetic valve and a water outletconnector, wherein the water inlet connector, the decompressing valve, the electromagnetic valve and the water outlet connector are connected in sequence; the water outlet connector is connected withthe water pipe through a connecting pipe; and the first temperature sensor, the second temperature sensor, the electric tracing strip and the electromagnetic valve are connected with the communicationcontrol module in a communication mode correspondingly. According to the heat pump assistant, split type arrangement of the inner machine device and the outer machine device is adopted, integrated installation and split installation can be achieved, the size is small, the weight is light, the structural design is ingenious, and the installation is convenient; and the temperature of a heat pump can be decreased in summer, the frost of the heat pump can be removed and the ice of the heat pump can be molten in winter, and normal operation of the heat pump is ensured.