Heat pump energy-saving system

The utility model discloses a heat pump energy-saving system which comprises a second evaporator, a first pipeline, a seventh pipeline, a third electronic expansion valve, a first flow dividing pipe and a second flow dividing pipe, and a flow dividing device is connected between the first pipeline and the second pipeline on the left side and the right side of the second evaporator. According to the flow dividing device, the left end and the right end of a third electronic expansion valve are connected with a first flow dividing pipe and a second flow dividing pipe correspondingly. A first shunting pipe of the shunting device is communicated with a first pipeline on the left side of the second evaporator, and then a second shunting pipe of the shunting device is communicated with a second pipeline on the right side of the second evaporator. In this way, when high-pressure refrigerant liquid enters the second evaporator through the first pipeline, a small part of the high-pressure refrigerant liquid enters the