Steering hydraulic cylinder with centering and locking functions

The invention discloses a steering hydraulic cylinder with centering and locking functions, and relates to the technical field of hydraulic machinery, the steering hydraulic cylinder comprises a hydraulic cylinder barrel, a piston rod and a centering and locking device, the piston rod is arranged at the front end of the hydraulic cylinder barrel, the centering and locking device comprises a cap end fixing structure, a rod end fixing structure and a locking structure, the cap end fixing structure is arranged at the front end of the piston rod, and the rod end fixing structure is arranged at the front end of the piston rod. A rod end fixing structure is arranged on the hydraulic cylinder barrel, the locking structure comprises an end clamp arranged on the rod end fixing structure and a locking clamp arranged on the cap end fixing structure, and when the locking clamp and the end clamp are locked together, extension of the piston rod is limited. The rear axle steering system can be simplified, and the occupied s