Introducing　C4.5　algorithm　into　graduates＇　employment　field,　organizing　and　analyzing　the　collected　tremendous　amount　of　historical　data,　building　classify　Decision-Tree,　generating　rule　set,　constructing　graduates＇　employment　prediction　model.　Using　Cross　Validation　algorithm　to　verify　the　accuracy　of　the　model,　and　gradually　accomplish　a　high-Accuracy　and　high-practically　prediction　model,　applying　this　prediction　model　to　the　employment　related　decision　making　and　college　major　structure　optimizing.　©　Published　under　licence　by　IOP　Publishing　Ltd.