A production device for manufacturing a product in the form of a sheet or a block, the production device comprises: an initial agitator, a primary conveyor belt, and a mixing agitator; the initial agitator is provided with a primary conveyor belt, one or more stones or a stone-like granular material having a selected particle size and a binder are initially mixed in the initial agitator and then an initial mixture is obtained; the mixing agitator comprises a rotating container for undertaking a material; the initial mixture is conveyed to the mixing agitator through the primary conveyor belt; more than one initial agitator and matched primary conveyor belts thereof are disposed around the mixing agitator at intervals; wherein the production device further comprises a dispersing apparatus, characterized in that the dispersing apparatus comprises a rolling brush and a driving assembly, the rolling brush is disposed above a discharge end of the primary conveyor belt and is rotated under driving of the driving assembly, the discharge end of the primary conveyor belt is disposed above the rotating container; the initial mixture passes through a gap between the rolling brush and the primary conveyor belt under driving of the primary conveyor belt; the rolling brush comprises a rotating shaft and a rolling brush base, a plurality of the rolling brush bases are detachably fitted and fixed onto the rotating shaft in parallel; the rolling brush base comprises a base portion and a rolling brush rod, the base portion is an annular structure that can be fitted on the rotating shaft, one end of the rolling brush rod is fixed on the annular structure, and the other end extends radially outward along a radial direction of the annular structure, and a plurality of the rolling brush rods are radially distributed around the annular structure. the initial agitator is provided with a primary conveyor belt, one or more stones or a stone-like granular material having a selected particle size and a binder are initially mixed in the initial agitator and then an initial mixture is obtained; the mixing agitator comprises a rotating container for undertaking a material; the initial mixture is conveyed to the mixing agitator through the primary conveyor belt; more than one initial agitator and matched primary conveyor belts thereof are disposed around the mixing agitator at intervals; wherein the production device further comprises a dispersing apparatus, characterized in that the dispersing apparatus comprises a rolling brush and a driving assembly, the rolling brush is disposed above a discharge end of the primary conveyor belt and is rotated under driving of the driving assembly, the discharge end of the primary conveyor belt is disposed above the rotating container; the initial mixture passes through a gap between the rolling brush and the primary conveyor belt under driving of the primary conveyor belt; the rolling brush comprises a rotating shaft and a rolling brush base, a plurality of the rolling brush bases are detachably fitted and fixed onto the rotating shaft in parallel; the rolling brush base comprises a base portion and a rolling brush rod, the base portion is an annular structure that can be fitted on the rotating shaft, one end of the rolling brush rod is fixed on the annular structure, and the other end extends radially outward along a radial direction of the annular structure, and a plurality of the rolling brush rods are radially distributed around the annular structure.