The　complex　inverse　position　solution　can　be　avoided　when　the　continuum　robot　works　in　the　velocity　mode,　but　the　position　output　error　in　the　velocity　mode　will　have　a　great　impact　on　the　end　motion　accuracy　of　the　continuum　robot.　In　this　paper,　from　the　point　of　view　of　servo　motor　output　accuracy,　the　open-loop　drive　accuracy　is　studied　based　on　kinematics.　In　addition,　a　position　compensator　based　on　vector　method　is　established　by　using　semi　closed　loop　feedback,　and　its　effectiveness　is　verified　by　experiments.