The invention relates to a flexible load dispatching control method for AGC. According to the invention, flexible loads are adopted to participate in system dispatching, the flexible loads are taken as control objects, the balance between the loads and a power supply is achieved by adopting a dispatching method applicable to the type of loads, the coordinated operation between the flexible loads is realized, the maximum consumption of clean energy is realized, and the waste is avoided. A consumption region utilizes the scheme to store heat and consumes generated electric energy. The kind of source-load interaction is an active behavior, and changes a situation that the power supply passively adapts to the loads in the past. When the flexible loads cannot meet the power excess, a buffer region abandons the consumption of partial new energy.