针对目前国内在循环流化床锅炉燃烧系统中存在的多变量耦合紧密及时变性强等问题，经过深入研究该锅炉燃烧过程的工艺条件特点，找出了紧密耦合的多变量之间的模糊关系；在分析现有的锅炉微机控制系统算法机理的基础上，结合模糊逻辑控制理论，设计了模糊逻辑自整定ＰＩＤ复合控制算法，并完成整个燃烧控制系统的设计，以期较好地解决负荷控制与温度控制之间的矛盾．实验运行表明该燃烧控制系统达到了预期的目的，可以推广应用于工业现场． In view of the current domestic problems of multivariable coupling and timely denaturation in the circulating fluidized bed boiler combustion system, the fuzzy relation between closely coupled multivariate variables is found by further studying the characteristics of the process conditions in the combustion process of the boiler. Based on the analysis of the existing boiler microcomputer control system algorithmic mechanism, combined with fuzzy logic control theory, the fuzzy logic self-tuning PID compound control algorithm is designed and the design of the whole combustion control system is completed in order to solve the problem of load control and temperature Conflict between controls. Experimental operation shows that the combustion control system has achieved the expected purpose and can be widely applied to industrial sites.