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. <EOS>