NOVELTY - Recycling butyl acetate, comprises: (a) extracting butyl acetate containing aqueous solution using an extracting agent; (b) collecting an organic phase as extracting agent from extracted mixed solution, and re-extracting; (c) distilling or rectifying collected organic phase, decompressing and distilling, collecting low-boiling point butyl acetate rectified and high-boiling point extracting agent; and (d) respectively performing alkaline-wash to high-boiling point extracting agent, and performing water-wash to resulted product, then regulating pH, and combining aqueous phase and discharging.    USE - The method is useful for recycling butyl acetate from aqueous solution containing butyl acetate in pharmaceutical industry and during industrial production.    ADVANTAGE - The method: has simple operation and utilizes simple device; has high extraction efficiency, short recycle period and large amount of treated waste water; is suitable for treating aqueous solution containing butyl acetate which having different qualities; and completely utilizes resources, thus protects environment and has low recycle cost.    DETAILED DESCRIPTION - Recycling butyl acetate, comprises: (a) taking aqueous solution containing butyl acetate, which is generated during production of medicine making industry, using hydrocarbon solvent as extracting agent, adding butyl acetate containing aqueous solution into the extracting agent at a condition that the ratio of extracting agent to butyl acetate containing aqueous solution is 1.1-10, mixing and agitating the mixture for 5-50 minutes and extracting, where the hydrocarbon solvent is liquid wax, high-boiling point solvent oil, light diesel fuel and/or heavy diesel fuel, which are mixed into required ratio; (b) statically placing the extracted mixed solution obtained in step (a) for 5-15 minutes to form different layers, respectively collecting organic phase in upper layer and aqueous phase in lower layer, using the collected organic phase as extracting agent, adding butyl acetate containing aqueous solution again into the extracting agent at a condition that the ratio of extracting agent to butyl acetate containing aqueous solution is 1.1-10, mixing and agitating the mixture for 5-50 minutes, re-extracting the solution, statically placing the extracted mixed solution for 5-15 minutes to form different layers, using the organic phase in upper layer as extracting agent for re-extraction again, and repeating this re-extraction for 10-30 times, and statically placing the lower aqueous phase; (c) placing the organic phase collected in the step (b) in a distilling tower or rectifying tower, distilling or rectifying or placing the organic phase in a decompressing distilling tower at 140-180 degrees C, decompressing and distilling the organic phase at 70-120 degrees C at a vacuum degree of 0.05-0.1 Mpa, respectively collecting low-boiling point butyl acetate rectified in the tower top and high-boiling point extracting agent left in the tower kettle; and (d) performing alkaline-wash to the high-boiling point extracting agent collected in the step (c) by strong sodium hydroxide alkaline solution whose pH is 12-14, agitating and alkaline-washing the high-boiling point extracting agent at a condition that the volume ratio of the high-boiling point extracting agent to the strong alkaline solution is 1:1-5, respectively collecting the alkaline-washed extracting agent and alkaline liquid, performing water-wash to the collected alkaline-washed extracting agent, agitating and performing water-wash to the extracting agent for 10-20 minutes at a condition that the volume ratio of the alkaline-washed extracting agent to water is 1:1-5, statically placing the extracting agent for 5-15 minutes, respectively the water-washed extracting agent and water washing liquid, adding strong sodium hydroxide alkaline into the collected alkaline liquid, regulating pH of the strong alkaline solution to 12-14, and combining the lower aqueous phase in the step (b) with the water washing liquid, and then discharging the liquid after standard treatment.