Waterproof elastic fabric and preparation method thereof

The invention relates to the field of fabric, and provides a waterproof elastic fabric and a preparation method thereof. The waterproof elastic fabric solves the problem that fabric in the prior art has the defects of no waterproof effect and low elasticity. The waterproof elastic fabric comprises a fabric body, wherein a polytetrafluoroethylene layer is arranged on the fabric body; a TPU film isarranged between the fabric body and the polytetrafluoroethylene layer; the TPU film is arranged between the fabric body and the polytetrafluoroethylene layer; the fabric body is formed by mixing andknitting spandex yarns and polyester filament yarns, and the spandex yarns adopt 75D/144F; an anti-oxidation layer is further arranged on the polytetrafluoroethylene layer; an ultraviolet light absorber and an antioxidant are added into the anti-oxidation layer. The preparation method of the TPU film comprises the following steps: adding an organic solvent into melted TPU for dissolution, then adding toner for color mixing