The problems in the styrene extraction unit at SINOPEC-SK (Wuhan) Petrochemical Company Limited and the improvement measures are introduced. Serious blockage of packing below the feed nozzle of styrene refining tower occurred only 2.5 months after the first startup of the unit. The reasons for the short operation period of the refining tower were analyzed combined with various data of the actual operation, and the main shortcomings of organic acid decoloring process were summarized. In order to overcome the disadvantage of easy polymerization of maleic anhydride with styrene, some attempts were made, such as lowering the concentration of maleic anhydride, lowering the operating temperature, replacing the pure maleic anhydride with a new decolorant and modifying the equipment. The comparison of the actual operation results before and after the implementation showed that several improvement attempts have achieved certain results.