The invention relates to a manufacturing method of agricultural cold-proof cloth. The agricultural cold-proof cloth is composed of at least two layers of non-woven cloth, wherein each layer of non-woven cloth is manufactured by mixing PP matrix resin, polyvinylidene fluoride, an MAH-g-PP compatilizer, pigment master batch and an anti-aging additive, and the agricultural cold-proof cloth is manufactured through feeding, high-temperature melting, filtering, metering by a metering pump, spinning, cooling, up-down stretching, web curtain conveying and hot rolling. The non-woven fabric of different layers are formed through sequential drawing and polymerizing of different lower stretchers in a conveying direction of a web curtain, and the drawing arrangement directions of the non-woven fabric of different layers are intersected on a doffing plane of the web curtain; finally, the obtained non-woven fabric of different layers are laminated and adhered together to form the degradable agricultural cold-proof cloth, and the degradable agricultural cold-proof cloth has the characteristics of the non-woven fabric, can well protect crops and fruit trees, and is beneficial to the growth of the crops and the fruit trees; and the product is tear-resistant and uniform in thickness, the usability of the product is improved, and the service life of the product is prolonged. The preparation process is simple, reduced in production cost and is suitable for industrial mass production.