We　introduce　the　concept　of　network　structure　entropy　to　describe　the　ordering　and　stability　of　supply　chain　system,　and　simulate　the　evolutionary　path　of　the　network　structure　by　matlab　and　pajak.　We　analyze　the　effect　of　the　topology　type,　the　network　scale,　and　the　connectivity　probability　between　different　nodes　on　the　stability　of　supply　chain　system,　and　try　to　optimize　the　system　stability　from　the　perspective　of　network　structure.　©　2011　IEEE.