Reduced-pressure distillation device

The utility model discloses a reduced-pressure distillation device, which comprises a bottom plate. A base is arranged on the bottom plate, a heater is arranged in the base, a distillation tank is arranged on the base, the heater is distributed at the bottom of the distillation tank, the distillation tank is connected with a reduced-pressure pipe, a liquid inlet pipe is inserted into the distillation tank, a liquid return box is arranged on the bottom plate and connected with the distillation tank through a distillation pipe, one end of the distillation pipe is connected with the top of the distillation tank while the other end of the distillation pipe is connected into the liquid return box in an insertion manner, a cooling box sheathes the distillation pipe, and cooling liquid is stored in the cooling box. According to the reduced-pressure distillation device, the pressure in the distillation tank can be controlled, the distillation separation of liquid can be carried out by heating the distillation tank th