High-optical shading parallel composite elastic fiber

The invention relates to a high-optical shading parallel composite elastic fiber. The high-optical shading parallel composite elastic fiber has a parallel composite structure which comprises two different components, each component is one of polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), poly A (PA), and polybutylece terephthalate (PBT), and TiO2 powder is added into the two components. The section of the parallel composite structure has the shape of double semi circles, a dumbbell, dog bone, a peanut and a runway and the like. The two components have different shrinkage factors, and the fiber forms a spiral structure in a length direction due to the difference of the shrinkage performance, so elasticity is formed. TiO2 superfine powder has the effects of repeatedly scattering and absorbing incident rays to ensure that a prepared textile has a good visual shading effect. The fiber has the elasticity and visual shading performance.