Convenient,　rapid,　efficient　and　anonymous　characteristic　of　P2P　technology,　enables　P2P　network　gathering　enormous　users　very　quickly,　and　P2P　traffic　has　occupied　60　similar　to　80%　bandwidth　of　Internet.　Such　giant　traffic　has　formed　a　threat　to　the　service　qualify　of　other　Internet　application　and　the　security　of　Internet　itself　However,　most　study,　about　P2P　traffic　monitoring　and　characteristic　focuses　on　traffic　identifying　technique.　Rare　study,　analyzes　P2P　traffic　behavior　from　P2P　mechanism　itself　This　paper　construct　P2P　network　queuing　model,　analyzes　the　influence　of　related　factors　to　the　load-scale　of　concrete　resource.　Main　conclusion　including,　compared　with　other　factors,　average　degree　of　node　and　TTL　value　is　the　most　key　factor　to　load-scale.　Load-scale　increases　with　node　quanti　v,　initial　number　of　objected　resource　and　resource＇s　total　quantity,　however,　when　those　quantity　reach　to　some　critical　threshold,　the　influence　of　those　factors　become　quite　weak　to　load-scale　of　resource.