The device mainly includes concentration can、condenser、gas-liquid separator、cooler and liquid receiving barrel. The concentration can is of clip-sleeve structure; the condenser is of row-pipe type; the cooler is of coiled type. The device is suitable for the concentration of the material liquid in such industries as pharmacy、food and chemistry, etc., and serves for the recycle of alcohol, simple returning distillation. The adoption of pressure reducing condensation and scrapper to wall protects the effective components of heat sensitive material. The contact part of the concentrator and the material is made with the stainless steel, resistant to corrosion and meeting the standard of the GMP.