The invention relates to a comprehensive energy system optimization dispatching method considering various flexible loads. The comprehensive energy system optimization dispatching method comprises thefollowing steps of 1) building a comprehensive energy system mathematical model comprising a gas turbine power generation system capable of moving, rotating, reducing a load model and storing energyaccording to an excitation compensation mechanism by combining power utilization and dispatching characteristic of each flexible load in the comprehensive energy system; and 2) building supply-demandcombination daily optimization dispatching model, taking total running cost as minimum according to the comprehensive energy system of which power, heat and load can participate in interaction, leading the model into an automatic computer system, solving output of each equipment of the comprehensive energy system by the automatic computer system, and controlling each equipment according to outputto obtain an optimization running result. Compared with the prior art, the comprehensive energy system optimization dispatching method has the advantages that the running cost of the system can be obviously reduced, the difference between peak and valley of the load is reduced, and the peak power utilization pressure is reduced.