According to the analysis of chemical composition and stability of the desulfuration residue from a power plant of Handan,the impact of the desulfuration residue content on the product performance was discussed.The desulfuration residue was used to replace the gypsum and part of fly ash for preparation of aerated concrete.The result indicated that the dry bulk density and intensity of aerated concrete block meet the requirements when the desulfuration residue content is 10%,which could keep down the congeal speed,prolong the congeal procession and keep the stoma;however,if the desulfuration residue content 15%,the product would crack as the result of the its lower activity,and the retarding effort would be bad when the gypsum is replaced by the desulfuration residue only.