Aiming　at　the　used　products　which　took　whole　remanufacturing　as　main　use　patterns　in　remanufacturing　system,　the　unconstrained　mixed-integer-programming　collection　model　with　single　period　was　proposed　by　considering　the　factors　such　as　used　product＇s　quality　and　the　reservation　collection　price.　The　optimal　collection　policy　of　model　which　included　collection　price,　collection　quantity　and　remanufacturing　cost　threshold　was　obtained　to　gain　maximum　expected　revenue.　The　effect　of　uesd　products＇　collection　quantity,　collection　quality,　waste　disposal　cost　and　reservation　collection　price　on　optimal　collection　policy　was　analyzed　by　numerical　simulation.　The　results　showed　that　the　collection　price　and　quantity　could　be　increased　with　stable　collection　source,　and　the　remanufacturer＇s　expected　profit　could　be　decreased　with　unit　disposal　cost　and　increased　with　the　used　product　quality.　Furthermore,　the　remanufacturer　had　more　willingness　to　remanufacture　but　had　little　incentive　to　increase　collection　price　for　higher　collection　quantity　based　on　the　merely　economic　benefits.