In　order　to　implement　software　integration　of　geometric　design　and　machine　setting　calculation　for　Kelingelnberg　cycloid　spiral　bevel　gear,　a　CAD　and　machine　setting　algorithm　software　system　was　developed　based　on　Visual　Basic　6.0　program　language　and　AutoCAD　2004　software　platform.　The　software　system　can　complete　geometry　parameter　calculation,　strength　check,　machine　parameter　setting　calculation,　data　output,　parametric　drawing　and　solid　modeling　of　Klingelnberg　cycloid　bevel　gear.　The　example　shows　that　the　operation　results　of　the　software　system　can　be　applied　to　engineering　design　and　tooth　machining　of　Kelingelnberg　cycloid　spiral　bevel　gear.