Windproof and warm-keeping composite fabric functional interlayer and preparation process thereof

The invention discloses a windproof and warm-keeping composite fabric functional interlayer and a preparation process thereof. A composite fabric comprises two fabric layers and a functional interlayer, the functional interlayer is located between the two fabric layers and is an asymmetric polyethylene microporous membrane, blind holes are formed in the upper surface of the functional interlayer,and a through hole is formed in the lower surface of the functional interlayer. By designing the functional interlayer structure and the preparation process, the blind holes are formed in the upper surface of the prepared functional interlayer, through holes are formed in the lower surface of the prepared functional interlayer, one-way circulation of air and water mist in the prepared composite fabric is controlled, the air permeability and the moisture permeability of the prepared composite fabric are ensured, the windproof and warm-keeping effects of the prepared composite fabric are achieved, and the prepared funct