The invention provides a production process of high-elasticity-feature terylene pre-oriented fibers. The production process is characterized by comprising the steps of 1) slicing a raw material, namely, modified polyester, conveying the material to a wet material bin to enable pre-crystallizing, and then ventilating and drying to obtain dry slices; 2) feeding the dry slices and an additive into a screw extrusion machine together under a melting condition, filtering and then transferring into a spinning box to obtain a melt; 3) metering the melt through a metering pump, and feeding into a spinning assembly to yield silks; 4) performing slow cooling and side blowing for the silks obtained in step 3) to cool and shape, and then applying oil; 5) pulling, stretching, and thermally shaping; 6) coiling through a coiling head to obtain the high-elasticity-feature terylene pre-oriented fibers. The high-elasticity-feature terylene pre-oriented fibers prepared by the production process have the advantages that the specification is up to 180dtex/ 36f, the breaking strength is not less than 1.80cN/ dtex, the elongation at break is 200+/30; the softness, sense of touch and rebound elasticity are superior to those of the general fibers, and moreover, the water absorbing performance, the oil absorbing performance and the cleaning function are high.