The invention discloses a vertebral pedicle fixator. The vertebral pedicle fixator comprises a fixing nail and a fastening piece, wherein the fixing nail comprises a nail body and a nail base positioned on the nail body, the nail base is provided with at least two nail grooves, each of the at least two nail grooves is used for accommodating a fixing bar, and the nail base is further matched with fastening piece to fix the fixing bars in the corresponding nail grooves. The invention further discloses a vertebral pedicle fixing system. With the adoption of the manner, during the secondary operation, the operation of cutting open all the parts of the primary operation is not needed, only a new fixing bar needs to be placed in the at least one vacant nail groove, then the extension of the fixing bar is realized, therefore, the wound caused by the secondary operation is small, the bleeding is tiny, the operation time is short, and the clinical application value is high.