The invention discloses a novel building template preparation method based on a pp base material. A building template comprises an inner pp base material layer, an outer pp base material layer and anantistatic coating layer, wherein a first groove is formed in the end surface of the inner pp base material layer; the cross section of the first groove takes the shape of an isosceles trapezoid; theend surface of one side of the outer pp base material layer is provided with a protrusion matched with the first groove; a second groove is formed in the end surface of the other side of the outer ppbase material; the inside of the second groove is coated with the antistatic coating layer; and the inner pp base material layer comprises the following raw materials in parts by weight: 50 to 60 parts of pp resin, 20 to 30 parts of a filler, 3 to 5 parts of a nucleating agent, 3 to 5 parts of a plasticizer, 5 to 7 parts of a stabilizer, 3 to 5 parts of a lubricant, 3 to 5 parts of an antistatic agent and 2 to 4 parts of a flame retardant. The novel building template preparation method solves the problems of low flatness, small number of use turnover times and easy deformation of a traditionalbuilding template by providing the inner pp base material layer, the outer pp base material layer, the antistatic coating and the first groove.