The gypsum-based self-leveling mortar of Qiangnai applies the energy-efficient modified semi-aqueous building gypsum as the gelling raw material, and produces single-component prefabricated dry powder products with ultra-fine inorganic fillers and various polymer modified activators and multi-level aggregates. After being mixed with water, it will form a high-fluidity slurry that can both be manually applied or mechanically applied in a large area. Featuring automatic and accurate ground leveling and high cost efficiency, it is a new type of green and technically-advancing flooring material that can replace work made with cement sand and fine stone concretes. One leveling is good enough for the construction needs of all decorative surfaces. The completed surface is suitable for the application of thinly laminated floor tiles, wooden floors, PVC floors, epoxy and polyurethane floor paint. It is widely used in floor leveling works of indoor structures.