The invention provides a production technology of a uniaxial tension high-strength warning tape which is used for replacing the traditional PVC warning tape. In the production technology, an alloy formed by blending polyethylene and polypropylene with high molecular weight is used, and a melting co-extrusion-uniaxial tension technology is adopted to prepare the high-strength warning tape. Through the adoption of the scheme, the problems that the traditional PVC warning tape is easy to degrade during the preparation process to generate toxic gas, the product is prone to aging, yellowing and color change, and the strength is poor are solved, the mechanical strength of the product is improved, and the product durability is improved; besides, the product is unique in appearance and high in stability, and the material cost is reduced.