This unit is mainly composed of dynamic extraction tank, evaporation concentrator and process piping, setting dynamic hot reflux extraction, vacuum concentration, solvent recovery in one; can continuously and synchronously in airtight condition for extraction and enrichment, and solvent steam during vapor back into the extracting tank after condensation can be secondly use of reheat steam extraction material to hot reflux dynamic extraction, applicable to Chinese medicine, biology, food, light industry and other industries of water and organic solvent at room temperature with about 60 ℃ low temperature extraction, with the advantages of less investment, high efficiency and energy saving .