The unit is composed of extraction tank, filter, liquid medicine pump, heater, evaporator, condenser, cooler, oil distributor, industrial computer, etc.After soaking and heating, the extraction liquid is pumped from the bottom of the extraction tank to the external heater. The excess pump liquid enters tangentially into the bottom of the extraction tank to reflux and plays a local stirring role.The extraction liquid is heated by the heater and then separated by flash evaporation in the separator concentrator. The secondary steam tangentially enters the extraction tank, on the one hand, the heat is transferred to the solvent in the extraction tank, and on the other hand, it plays a stirring role. The residual gas goes all the way to the condenser to cool into solvent, reflux into the extraction tank. All the way into the condensate heater for heat exchange, so that the temperature of the condensate is close to the boiling point of the extraction tank solution, and the residual gas enters the condenser. Due to the large return flow rate of solvent, the density of solute contained in medicinal materials and solvent maintained a high gradient, and the solute dissolved quickly.The unit not only has the excellent function of extracting and concentrating Chinese herbs (dried products). It also has a powerful function of low temperature extraction and concentration of fresh plant products to maintain fresh flavor. Such as fresh flowers, aloe and other fresh products extract concentration. It has shown its powerful functional advantages in the practical application of traditional Chinese medicine factories, health products factories and other factories. The machine can also be used for the extraction and concentration of animals and Marine organisms in natural condiments and food additives.