The invention provides a fireproof interior wall dry-mixed mortar. The fireproof interior wall dry-mixed mortar comprises the following components: Portland cement, quartz sand, a filling material, bentonite, redispersible emulsion powder, cellulose ether, citric acid, and nanoscale titanium dioxide. The product has good adhesion to a base surface, the materials are economic and practical, so that cost is saved, at the same time after the base is treated by the material, phenomena of empty drum and shell do not exist, cleaning of construction site is guaranteed, and environmental protection requirements are met; gangue replaces parts of yellow sand, so that pollution is reduced, cost is reduced, and fireproof effects are realized.