In　order　to　improve　the　accuracy　of　measurement　the　correction　of　time　base　error　of　oscilloscope　is　essential.　In　this　paper　we　studied　time　base　error.　There　are　three　kinds　of　time　base　error　including　time　base　drift,　time　base　jitter　and　time　base　distortion.　Reason　of　time　base　error　causes　and　the　influence　for　measurement　and　calibration,　the　method　for　correction　or　compensation　were　studied.　We　also　had　good　results　as　we　process　the　experiment　data　which　proofed　the　method　in　this　paper　were　right.　©　2013　IEEE.