To　understand　the　factors　and　their　influencing　mechanisms　on　PhD　students＇　creativity,　we　propose　an　extended　scientific　and　technical　human　capital　(STHC)　model　to　examine　the　structural　relationships　among　different　sources　of　social　capital,　psychological　capital,　and　PhD　students＇　creativity　and　to　test　the　moderating　role　of　gender,　industry　experience,　and　interdisciplinary　experience　on　the　structural　model.　Data　are　collected　from　201　respondents　enrolled　in　the　Joint　Training　Pilot　Project　(JTPP)　in　2010　and　2011.　The　results　show　that　(1)　university　social　capital　has　a　significant　direct　influence　on　PhD　students＇　creativity,　while　industry　social　capital　has　no　significant　direct　effect;　(2)　psychological　capital　partially　mediates　the　relationship　between　university　social　capital　and　creativity　and　fully　mediates　the　industry　social　capital　and　creativity　linkage;　and　(3)　gender,　industry　experience,　and　interdisciplinary　experience　moderate　several　paths.　Theoretical　and　practical　implications　are　discussed,　and　recommended　directions　for　future　research　are　suggested.