The invention provides a stretch-resistant fracture-resistant high molecular film material and a preparation method thereof. The film material is prepared from polypropylene, polyarylester, polystyrene, polyethylene glycol laurate, polyethylene glycol terephthalate, polydimethylsiloxane, antioxidants 300, zirconium tetrafluoride and zirconium dioxide. The high molecular film material has good comprehensive performance. The tensile strength can reach 79.5 MPa to the highest degree; the breaking elongation can reach 366 percent to the highest degree. Compared with a film material in the prior art, the stretch-resistant fracture-resistant high molecular film material has the wider application prospects. Through the addition of the zirconium tetrafluoride and the zirconium dioxide at the specific weight ratio, the specific preparation process is used, so that the whole performance of the film material is improved; particularly, the tensile strength and the breaking elongation are greatly improved; the stretch-resistant fracture-resistant high molecular film material is suitable for being used in high-temperature environment; the result greatly exceeds the expectations of technicians inthe field.