The invention discloses a PVC furniture board and a preparation method thereof. The PVC furniture board comprises the following raw materials by weight: PVC resin, light calcium carbonate, calcium stearate, zinc stearate, zinc acetylacetonate, zinc beta-diketone, phosphite ester, dipentaerythritol alkyl ester, an antioxidant, hydrotalcite, zeolite, glyceryl monostearate, an internal lubricant G60,PE wax, polyethylene wax AC316A, a foaming agent AC, sodium bicarbonate, a processing auxiliary agent K718, a whitening agent and TiO2. The PVC furniture board obtained by using the method provided by the invention is environmentally-friendly and safe, has good thermal stability, is uniform to foam, and has Shore hardness of no less than 70 D, tensile strength of no less than 12 Mpa, elongation at break of no less than 10% and a bending elastic modulus of no less than 1780 MPa.