CDN　is　a　kind　of　overlay　network　that　was　used　to　the　content　acceleration　on　Internet.　How　to　ensure　service　quality　is　an　important　issue　in　CDN.　Differentiated　service　is　a　way　to　ensure　the　QoS　in　other　basic　network.　In　this　paper,　the　multi-queue　management　and　scheduling　mechanism　was　introduced　to　the　service　load　management　in　CDN,　so　it　can　supports　differentiated　service　for　the　content　service　resources.　Each　content　object　has　a　different　quality　mark.　The　quality　mark　of　the　request　content　object　was　identified　for　classification.　Different　types　have　different　sub-queues.　Queue　scheduling　module　is　responsible　for　scheduling　service　resources.　The　objects　with　high　rank　mark　get　more　service　resources,　so　get　better　quality.　Finally,　the　mathematical　model　of　this　method　was　established,　and　the　experimental　program　was　set　up　for　the　analysis.　The　experimental　results　show　that　the　method　supports　differentiated　services　for　service　resources　to　ensure　the　quality,　and　controls　the　congestion　effectively.　©　Proceedings　of　2018　the　8th　International　Workshop　on　Computer　Science　and　Engineering,　WCSE　2018.　All　rights　reserved.