At　present,　studies　on　real-time　performance　and　reliability　of　WSN　are　mostly　based　on　the　performance　analysis,　protocol　optimization　or　mathematical　modeling　with　IEEE　802.15.4　standard　MAC　Protocol.　However,　there　is　no　concern　about　the　large　impact　on　the　network　real-time　and　reliability　caused　by　duration　of　the　competitive　access　control　phase　(CAP)　and　non-competitive　access　control　stage　(CFP)　in　the　IEEE　802.15.4　standard　superframe　structure.　To　solve　these　problems,　a　MAC　layer　superframe　mechanism　simulation　algorithm　was　designed　and　implemented　to　simulate　the　IEEE802.15.4　standard　MAC-layer　superframe　mechanism　by　establishing　a　state　machine　model.　This　design　also　built　a　simulation　platform　which　could　use　visual　interface　to　customize　the　application　scenarios,　and　compute　the　network　performance　when　using　different　superframe　structure.　As　a　result,　the　platform　can　offer　the　optimized　recommendations　for　superframe　structure.　This　research　provides　a　new　solution　for　optimizing　the　superframe　structure.　Moreover,　it　also　establishes　theoretical　basis　for　next　generation　of　the　network　protocols.　©,　2015,　Chinese　Association　for　System　Simulation.　All　right　reserved.