The invention discloses a double-layered cavity fiber web reinforced grouting full-length reinforced freezing pipe and a construction method thereof. The pipe mainly comprises a main body structure with steel pipes with large and small diameters in sleeve connection to form a cavity of inner and outer walls, a bottom taper angle device connecting the inner and outer steel pipe walls of the main body structure and an inner and outer pipe top port sealing device. The bottom taper angle device is also of a double-layered cavity structure communicated with the cavity of the main body structure, and the bottom taper angle device is internally provided with a one-way backstop pressure valve communicated with the inside of the freezing pipe and the cavity. According to the design, by means of matched operation of a liquid feeding pipe and the one-way backstop pressure valve, cement slurry is injected into the cavity of the main body structure, and a pre-placed fiber web is placed to form fiber web reinforced concrete. The stiffness, the strength and the corrosion resistance of the freezing pipe are greatly improved. The freezing pipe is suitable for the stratum freezing method construction project subjected to complex high stress and aqueous corrosion, effectively reduces the accident probability of freezing wall melting due to salt leakage caused by damage and fracture caused by thecorrosion and the high stress, and avoids inducing flooding accidents.