The utility model discloses a heat pump double-effect evaporation and concentration system with direct steam auxiliary starting, and relates to an evaporation and concentration system. The problems that an existing conventional multi-effect evaporation and concentration system wastes energy, and is poor in operation stability and low in efficiency are solved. A heat pump working medium circulatingpipeline is communicated with a heat pump evaporator through a heat pump condenser; the heat pump compressor is installed on a gaseous working medium pipeline where a working medium flows from the heat pump evaporator to the heat pump condenser in the heat pump working medium circulation pipeline, and the heat pump throttling expansion device is installed on a liquid working medium pipeline wherethe working medium flows from the heat pump condenser to the heat pump evaporator in the heat pump working medium circulation pipeline. And the live steam pipeline is arranged at the intersection ofthe first secondary steam pipeline and the second secondary steam pipeline. According to the heat pump double-effect evaporation and concentration system, the use amount of raw steam in the concentration process is reduced, energy conservation in the low-temperature evaporation and concentration process can be effectively achieved, and the heat pump double-effect evaporation and concentration system can be rapidly and stably started by enabling the steam to directly enter the double-effect system.