Express　distribution　network,　as　a　supernetwork　system,　was　of　characteristics　of　multi-layer　and　multi-dimension　which　consisted　of　physical　subnetwork　and　management　subnetwork,　the　structure　and　the　delivery　mode　of　physical　network　is　affected　by　the　organization　mode　and　operation　mechanism　of　management　network.　A　supernetwork　model　was　given　to　describe　the　structure　of　express　distribution　system,　the　formation　mechanism　of　community　structure　and　sub-cores　of　physical　network　was　analyzed,　the　fact,　that　delivery　centers　are　regarded　as　the　regional　business　centers　brings　each　community　a　clear　boundary,　was　also　demonstrated.　According　to　its　structural　features,　a　segmental　optimization　method　with　features　of　parallel　operation　based　on　local　search　was　proposed,　and　the　time　complexity　of　this　algorithm　was　also　discussed.　The　method　was　illustrated　by　an　application　case　in　the　end,　results　showed　that　our　optimization　method　can　effectively　reduce　computation　complexity　while　keeping　the　calculation　precision.　©,　2014,　Systems　Engineering　Society　of　China.　All　right　reserved.