The invention discloses a backing roll
fiber-
braided composite layer and belongs to a backing roll. The composite layer comprises a
fiber-braided structure reinforcement layer and a pouring layer; the outside of the
fiber-braided structure reinforcement layer is wrapped by the pouring layer; the fiber-braided structure reinforcement layer is a sleeve-mesh-shaped braided fabric formed by braiding a composite in a braiding
machine and is single-layer or multilayer; the pouring layer is formed by wrapping an external cylinder of the fiber-braided structure reinforcement layer by using various materials through a pouring process; and the pouring layer is made of resin, rubber or
polyurethane. The composite layer disclosed by the invention is braided in a reciprocated way by using the braiding
machine, so that the thickness of an outer layer is increased, and the drop of the fiber-braided structure reinforcement layer is avoided; the outer cylinder is formed by pouring a special high-strength material for the backing roll; and the backing roll fiber-
braided composite layer is light in weight, high in tensile strength, free of breakage at the outer layer, small in
rotary inertia, high in outer cylinder precision, free of deformation, free of mechanical
waves on the formed backing roll, antistatic,
corrosion-resistant, high-temperature-resistant and long in life, so that the product quality is improved, and the productivity is increased.