This machine is composed of 5 parts-concentrating tin, condenser, gas-liquid separator, cooler and collector. Concentration tin is in jacket structure, condenser in shell and tube style, cooler in coil tube style. It is suitable for concentration of medicine, chemical Industry, foodstuff industry and suitable for simple reflux extraction and recycling alcohol recycling. The parts contacting with the material are made of stainless steel with feature of corrosion resistance, ease cleaning, meet GMP standard.