Anchor rod library with adjustable anchor rod length for anchor rod trolley

The utility model relates to an anchor rod warehouse with an adjustable anchor rod length for an anchor rod trolley, which comprises a main shaft, an anchor rod mounting disc, a rotary driving device, a propelling beam, a fixed clamp, a sliding clamp and a telescopic oil cylinder, the main shaft comprises a fixed shaft and a telescopic shaft which are coaxial, and the fixed shaft and the telescopic shaft are mounted into a whole through a connecting structure; the telescopic shaft can slide in the axial direction relative to the fixed shaft and is relatively fixed in the radial direction and the rotating direction. The fixing shaft is fixed to one end of the propelling beam through the fixing clamp and can rotate relative to the fixing clamp. The telescopic shaft is located at the other end of the propelling beam and installed on a sliding rail of the propelling beam through a sliding clamp, a sliding block is installed at the joint of the sliding clamp and the sliding rail, and the telescopic shaft is pushed