The invention discloses a carpenter stone decorative prefabricated component and a production method thereof. The carpenter stone decorative prefabricated component includes a concrete component, a carpenter stone layer arranged thereon, and a decorative layer that is formed through a coloring reaction on the surface of the carpenter stone layer by means of an acidic coloring agent. The carpenter stone layer has concave grains imitating the grains in stones or brick walls. The carpenter stone layer comprises, by mass, 80-100 parts of an inorganic cementing material, 100-115 parts of graded aggregate, 7-10 parts of carpenter stone liquid, 0.5-0.8 parts of PVA fibers, 3-4.5 parts of an anti-cracking agent, and 62-65 parts of water. The carpenter stone layer is arranged on the concrete component and then the decorative layer is formed through the coloring reaction on the surface of the carpenter stone layer by means of the acidic coloring agent so as to achieve imitation effect. The component is free of generation of radioactive elements, is environment-friendly, is flexible and has diversity and has great artistic modeling value.