Corrosion-resistant high-elastic composite fiber and preparation method thereof

The invention discloses a corrosion-resistant high-elastic composite fiber and a preparation method thereof, and the preparation method comprises the following steps: infiltrating glass fiber cloth in a resin pre-impregnation liquid, then taking out the glass fiber cloth, and carrying out lamination, compression molding and post-curing treatment to obtain the corrosion-resistant high-elastic composite fiber. The preimpregnation liquid is resin preimpregnation liquid, dendritic nano silicon dioxide is added into the resin preimpregnation liquid, the dendritic nano silicon dioxide can be used as a reinforcing filler, glass fibers and resin can be combined, a bridge effect is achieved, and good interface combination between the glass fibers and the resin is guaranteed; the influence on the mechanical property of the material due to the generation of base material internal defects such as base material cavities and resin cavities caused by poor impregnation is reduced or even avoided, and the service life of the