The cracking furnace of the ethylene plant of a petrochemical company increases the processing capacity of light hydrocarbons, reducing the production of mixed C₄ to 8.5 t/h, which can be used to produce about 4 t/h of butadiene in the butadiene plant. The requirement of butadiene feed for the full-load operation of two lines in butadiene rubber plant is 5.4 t/h, with a gap of about 1.2 t/h. With a high TBC concentration, the butadiene product from the new area cannot be directly used by the butadiene rubber plant in the old area, so it needs to be recycled to the butadiene plant of the ethylene plant No.2 for re-refining to ensure its reaction performance. At present, the butadiene with high TBC concentration from the butadiene plant of the ethylene plant No.1 is sent to the butadiene storage tank of the ethylene plant No.2, and then 1.2 t/h of butadiene with high TBC concentration is recycled via the re-refining line into butadiene distillation tower for TBC removal to meet the butadiene demand of the butadiene rubber plant. Therefore, a recycled stream of butadiene feed is added to the conventional distillation system. The storage temperature of butadiene product tank not only affects the consumption of freezing liquid, but also affects the heat balance of butadiene distillation tower and the load of tower kettle reboiler. In this paper, by controlling the temperature of Tank T-902A during the re-refining of 1,3-butadiene product with high TBC concentration from the new area, the energy consumption of the plant can be reduced, and cost reduction, efficiency increase and high quality development can be achieved.