Abstract:The oil in the outboard arm of loading arms has to be discharged into loading oil ships with no value, which is great economical loss of oil companies, since there isn't corresponding recovery device all long. According to the principle of loading arms hydraulic control system and the explosionproof safety requirements, a new kind of residual oil recovery unite was developed, using automatic hydraulic control technology and the original dynamics power of loading arms hydraulic system, the principle was introduced in detail. The operation simulation model was built by AMESim, applying numerical simulation to research the operation and analyze the simulation results. The simulation results show that the design is reasonable, the operation is reliable and the device can realize residual oil recovery effectively.