The invention discloses a new energy electric vehicle thermal management system with an all-weather multi-mode switching function. The new energy electric vehicle thermal management system comprises arefrigerating/heating system with the all-weather multi-mode switching function and a battery pack. The refrigerating/heating system comprises an air compressor, a four-way reversing valve, a gas-liquid separator, an expansion valve, a heat exchanger, a circulating pump, an electromagnetic valve set, a three-way valve set and a fin heat exchanger set. The battery pack comprises a battery box body, a voltage-sharing and shunting recombiner, a voltage equalizer and a junction station; the battery box body comprises a plurality of single batteries internally, and a heat accumulating type active/passive combined liquid temperature control unit is arranged between every two single batteries. The new energy electric vehicle thermal management system has multiple working modes, switching can beconveniently conducted under different weather conditions such as hot weather and cold weather, the multiple advantages of single-phase forced convection heat exchange, solid-liquid phase change heatexchange and gas-liquid phase change heat exchange are reasonably combined, and the requirements for compartment internal temperature adjustment and power battery temperature control and temperature equalization are met.