Abstract: The process for styrene recovery from pygas C8 fraction by extraction-distillation technology was investigated. The selection of solvent, polymerization inhibitor and bench scale test were tested, meanwhile the process design package of 30 kt/a extraction-distillation unit and industrial test were finished. The results show that the color of styrene product after decoloration refining is less than 10, the purity is 99.80%. This technology is successfully applied in extractive-distillation plant of Guandong Xinhuayue Petrochem Co. The operation is stable and the operation parameters are all achieved. The industrial results show that the purity of styrene is 99.87%, the platinum - cobalt color is less than 10. The product quality achieves the national superior grade. The total recovery of the process, including pre-fractionation, phenylacetylene hydrogenation, is 94.3%.