To observe the clinical outcomes of using a new instrumentation SOCON system in the treatment of degenerative spondylolisthesis. Methods. Retrospective clinical and roentgenograph review of 21 patients who suffered from degenerative spondylolisthesis with spinal stenosis treated by decompression

posterolateral intertransverse arthrodesis

and with transpedicle instrumentation of SOCON system. Results.Nineteen of 21 patients were completely recovery from their preoperative symptoms

17 of 18 cases with grade one slippage reduced to normal spine alignment

2 cases of grade two slippage fully reduced

and one case of grade two spondylolisthesis got 70% reduction. Post operative satisfactory rate was 90.5%. Pain relief was 90.5%. Neither infection nor neurologic complication occurred in this series. Conclusion. Our short time followup and limited cases showed satisfactory preliminary result of surgical treatment of spondylolisthesis with SOCON instrumentation.