The invention provides a double-layer nylon double-layer steel wire tire bead seam allowance structure, which can further improve the performance of a tire bead seam allowance part, enhance the overload resistance and reduce the problems of the tire bead seam allowance part. The double-layer nylon double-layer steel wire tire bead seam allowance structure comprises sidewall rubber, wear-resistantrubber, a steel wire ring, triangular filling rubber, a belt ply and a tire body, the steel wire ring is located at the bottom of the tire body and is wrapped by the tire body in a U shape, the triangular filling rubber is positioned at the upper end of the steel wire ring and is wrapped by the tire body in a U shape, the sidewall rubber is arranged at the upper end of the wear-resistant rubber, and the inner side is connected with the triangular filling rubber. The double-layer nylon double-layer steel wire tire bead seam allowance structure further comprises a first steel wire reinforcing layer, a second steel wire reinforcing layer, a first nylon reinforcing layer and a second nylon reinforcing layer, wherein the first steel wire reinforcing layer wraps the periphery of the tire body ina U shape, the second steel wire reinforcing layer is attached to the inner side of the first steel wire reinforcing layer in an L shape, and the first nylon reinforcing layer and the second nylon reinforcing layer wrap the periphery of the first steel wire reinforcing layer and the periphery of the second steel wire reinforcing layer in a U shape.