The aluminum sulfate powder spraying granulation and flaking machine evenly distributes the hot melted material from the upstream process onto the steel strip moving uniformly below it through the granulator distributor. A continuous water spraying and cooling device is installed below the steel strip to force the material on the steel strip to solidify and cool quickly during the movement process, thereby achieving the purpose of granulation and shaping. According to the physical properties and process requirements, different types of granulator feeders with different principles such as external rotation, internal rotation, reciprocating, and gate can be selected. According to physical properties and usage requirements, fabric forms such as intermittent dripping, continuous striping, and full width overflow can be selected to produce hemispherical, strip-shaped, and sheet-like products respectively.