Anti-leakage plastic film for building roof and production method thereof

The invention discloses an anti-leakage plastic film for a building roof and a production method thereof. The anti-leakage plastic film is prepared from the following raw materials in percentage by weight: 78.7 percent of HDPE, 20 percent of mPE metal polyethylene, 0.5 percent of coupling agent TTOP-12, 0.4 percent of antioxidant 1076, 0.35 percent of ultraviolet absorbent UV531, and 0.05 percent of light stabilizer GW-540. The production method comprises the following steps: performing conventional high-speed kneading on the HDPE and the coupling agent accounting for 1 percent of the raw materials, then performing conventional high-speed mixing on the HDPE and aid accounting for 5 percent of the raw materials, and extruding and granulating the mixture to obtain a mother material; and blending the mother material and the main material consisting of the HDPE and the mPE metal polyethylene and accounting for 72.7 percent of the raw materials, and extruding, molding, embossing and inspecting the mixture, wherein