In　order　to　prevent　rational　participants　cheating　during　the　secret　sharing　process,　the　extensive　form　game　theory　was　introduced　to　the　secret　sharing　scheme.　The　dealer　distributed　several　sub-secret　shadows　instead　of　the　secret　shadows　to　each　participant,　from　which　a　multi-round　game　model　was　constructed　to　simulate　the　secret　sharing　process.　The　designed　game　strategies　made　rational　participants　not　distinguish　which　round　was　the　last　one　of　the　game　and　have　no　incentive　to　cheat.　It　ensures　all　participants　could　receive　the　secret,　realizing　the　fairness.　Furthermore,　compared　with　prior　rational　secret　sharing　schemes　which　assumed　the　secret　shadows　must　be　broadcasted　simultaneously,　ours　is　capable　of　achieving　over　standard　synchronous　channels,　which　is　more　practical.　©　2011　Binary　Information　Press.