Novel locking bolt

The utility model provides a novel locking bolt, comprising a bolt body. An external thread is arranged on the bolt body; a wedged inclined face is arranged on a root of the external thread; an upper end point of the wedged inclined face is located below a middle diameter L1 of the external thread; and an axial included angle alpha between the wedged inclined face and threads is 35-38 degrees. A locking force (an axial force) on a locking bolt connection pair is uniformly distributed among threads, so that an entire engagement face is stressed. Therefore, the entire locking capacity of the bolt pair can be greatly improved, and the fatigue service life of the bolt pair can be prolonged. An included angle between a locking force direction and a bolt axis direction is changed from 30 degrees of an ordinary bolt connection pair to be about 60 degrees, due to the variation of a stressed point. The axial force of the connection pair is increased, so that the transverse movement of the thread connection pair is limited, and the bolt connection pair is prevented from being released.