A spinal fixation system, the system including: an alignment assembly comprising: a fastening element； and a mating element configured to receiving the fastening element thereover and having a releasable connector, a fixation assembly comprising: a plate having an aligning aperture that allows the mating element to be received therethrough； and an implant configured to be received between adjacent vertebrae and releasably connect with the releasable connector, wherein the fastening element is configured to move along the mating element to engage with the plate.
