The invention discloses a method for sulfur fixation temperature control burning of coal gangue and efficient coupling and utilizing of lime ash, belongs to the technical field of resource utilization of solid wastes and provides the method for the sulfur fixation temperature control burning of the coal gangue and efficient coupling and utilizing of the lime ash. By using the technology, a circulating fluidized bedboiler can operate safely, stably and reliably, and efficient, automatic and accurate coal blending is realized under the condition of storing coal on a large scale; meanwhile, fly ash is utilized on a large scale. The method comprises the following steps of a, screening and crushing low-grade fuel; b, screening crushed fuel for mixing; c, intelligently controlling the mixed fuel to burn; d, after burning, performing temperature control cooling on the burnt lime ash; e, performing superfine grinding on cooled fly ash. The method disclosed by the invention is mainly applied to temperature control burning of the circulating fluidized bedboiler and efficient utilization of the lime ash.