在精馏塔单塔模拟与优化的基础上，研究了精馏塔串联塔系的整体优化和简单分散优化，构造出以经济效益最大为目标函数的优化命题并用ＳＱＰ优化算法求解。基于某厂乙苯车间苯回收塔和乙苯产品塔的整体优化与简单分散优化的仿真结果比较，得到的结果整体优化优于简单分散优化 Based on the simulation and optimization of the single tower of the rectification column, the overall optimization and simple decentralization optimization of the series column system of the rectification column are studied. The optimization proposition with the maximum economic benefit as the objective function is constructed and solved by the SQP optimization algorithm. Based on the simulation results of the overall optimization of the benzene recovery column and the ethylbenzene product tower of a benzene plant in the ethylbenzene plant and the simple decentralized optimization, the overall optimization result is better than that of the simple decentralized optimization