Scaled intervertebral dilator capable of being adjusted through lumbar vertebral pedicle screw

The utility model discloses a graduated intervertebral dilator capable of being adjusted through a lumbar pedicle screw, which comprises an adjusting rod, the front end of the adjusting rod is fixedly connected with a fixed arm, the side wall of the adjusting rod is connected with a movable arm in a sliding manner, and the movable arm and the fixed arm are arranged in parallel; one end, far away from the adjusting rod, of the fixed arm and one end, far away from the adjusting rod, of the movable arm are both connected with a sleeve through an adjusting device, a locking rod used for being connected with a pedicle screw is connected into the sleeve in a meshed and sleeved mode, and a driving mechanism used for driving a pedicle screw cap to rotate is arranged in the locking rod. When the screw rod is rotated, the movable arm moves on the adjusting rod towards one side far away from the fixed arm, and when the screw rod stops rotating, the position of the movable arm after movement is fixed, so that after the i