The utility model discloses a high-strength bolt for a steel net rack bolt-sphere joint, which relates to the technical field of steel net rack bolts, and comprises a bolt head, a cylinder part and a screw rod part which are connected in sequence, and further comprises a protective structure and a reinforcing structure which are arranged on the cylinder part, the protection structure comprises a supporting circular ring, a supporting spring, a protection sleeve, a sealing
rubber ring and a covering rubber sleeve, and the supporting circular ring fixedly sleeves the
peripheral surface of the cylindrical part; the reinforcing structure comprises a reinforcing strip, a rectangular groove is formed in the edge of the end, close to the cylindrical portion, of the bolt head, the supporting spring is pushed and compressed by the covering rubber sleeve to help the covering rubber sleeve to abut against the bolt ball, and the connecting position of the screw portion and the bolt ball is sealed and covered to prevent external rainwater from entering the bolt ball. The sealing
rubber ring fixedly arranged on the inner wall of the protective sleeve is tightly attached to the
peripheral face of the cylindrical part to prevent air and rainwater from entering the covering rubber sleeve. According to the scheme, the protective component blocks rainwater, and the bolt is prevented from loosening due to
corrosion.