The invention discloses a lightweight pottery sand stone-like paint and a preparation method thereof. The paint is composed of the following raw materials in percentage by weight: 16 to 21% of silicon acrylic emulsion, 14 to 17% of water, 55 to 63% of pottery sand, 4 to 6% of natural rock sheet, 0.3 to 0.7% of water-retaining agent, 0.1 to 0.3% of antifoaming agent, 0.3 to 2% of wood fiber, and 0.3 to 0.6% of antiseptic. In the provided paint, the pottery sand is used as a filling material to replace the natural colorful sand used in the conventional stone-like paints, and thus the unit weight of the stone-like paint is effectively reduced (the unit weight of pottery sand is less than 1100 kg/m3, while the unit weight of natural colorful sand is 1750 kg/m3). The self weight of buildings can be reduced, and the bearing on the building foundation is relieved. Furthermore, natural rock sheets are added to improve the stone texture of the stone-like paint and enhance the imitation effect. Moreover, the product preparation method is simple, and the paint has the advantages of excellent construction performance, cracking resistance, acid resistance, alkali resistance, corrosion resistance, no toxicity, no odor, no pollution to environment, safety, and environment-friendliness.