▎ 摘　　要

NOVELTY - Depolymerizing fiber-reinforced composite material comprises pre-treating by introducing fiber-reinforced composite material and precursor of heterogeneous element into treated water containing a non-condensable solvent, and separating the fiber material by depolymerizing the pretreated fiber-reinforced composite material. USE - The method is useful for depolymerizing fiber-reinforced composite material. The textile material is useful in field of automobiles, aerospace, sports and leisure, preferably structural buildings, transportation equipment. ADVANTAGE - The composite material: has high mechanical strength to weight, heat resistance, and chemical resistance; reduces maintenance; improves high fuel efficiency through weight reduction; is harmless to the human body; can easily recovered and reused. The method is environmentally friendly; and has good thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for textile material comprising fiber material recovered from a fiber-reinforced composite material, where the polymer resin residual rate of the fiber material is less than or equal to 10%.