The invention discloses a matte repairable BMC material and a preparation method thereof. The matte repairable BMC material comprises the following raw materials in percentage by weight: 15%-25% of unsaturated polyester resin, 5%-10% of an additive, 50%-60% of filler, 10%-20% of glass fiber, 1%-2% of an initiator, 1%-2% of an internal release agent, 1%-2% of a thickening agent, 0.5%-1% of a coloring agent and 1%-2% of a dispersing agent. According to the invention, previous ingredients are re-proportioned, a new kneading technology is applied, and then high-temperature mould pressing is carried out, so that the product has specific glass fiber lines and more uniform particle distribution, and more importantly, the product has unique characteristics and is polishable and repairable, and a sanitary appliance product produced by the reformed technology is fine, smooth, clean and moist in surface, good in durability, good in durability, elegant in shape, comfortable in body feeling, high in strength and durable in service.