The invention discloses a novel PVC tile and a preparing method thereof. The middle of the PVC tile is a downward concave arc, in other words, the PVC tile is wavy so as to facilitate drainage of a roof. The preparing method comprises the steps of preparing a PVC composite plate firstly, and then forming anti-UV resin surface layer on the upper surface of the plate through co-extrusion. The formula of the novel PVC tile comprises PVC, a foaming agent, a biobased material or inorganic filler, an MBS resin, an inorganic flame retardant and anti-UV resin. According to the PVC tile, on the premise that sun shading and rain sheltering are guaranteed, flame retardant property, light weight, sound insulation, attractiveness, aging resistance and heat insulation are all improved, cost can be reduced, and the environment-friendly requirement for sustainable development is met; the preparing method is simple, and industrialization can be achieved easily. Furthermore, installation is convenient, construction period is short, and the novel PVC tile can be widely applied to top surface installation of various buildings.