Medium-coarse　grained　granite　of　the　Zijinshan　pluton,　fine　grained　monzogranite　in　west　of　Shibizhai,　and　porphyritic　biotite　monzogranite　in　east　of　Shibizhai　were　selected　to　conduct　U-Pb,　Lu-Hf　and　trace　elements　analysis.　LA-ICP-MS　dating　of　zircons　from　three　rock　bodies　yielded　three　magma　crystallization　ages　of　156.5±2.7Ma　(late　Jurassic),　166.2±8.1Ma　(middle　Jurassic)　and　154.1±1.4Ma　(late　Jurassic)　for　three　rock　bodies,　respectively.　Zircon　Lu-Hf　isotope　analysis　results　show　that　zircon　Hf　isotope　two-stage　model　ages　(tDM2)　are　1.6~2.2Ga,　1.7~2.0Ga　and　1.7~1.9Ga.　Zircon　Hf　isotope　initial　values　(ΕHf(t))　are　negative:　-14.88~-8.40,　-11.9~-7.8　and　-10.9~-7.4.　The　zircon　ΕHf(t)　and　Hf　isotope　crustal　model　ages　vary　in　a　small　range,　implying　that　magma　source　was　of　much　uniform　zircon　Hf　isotope　composition.　During　the　Middle　Jurassic　(166.2±8.1Ma),　paleo-Pacific　plate　collided　with　Eurasian　plate,　resulting　in　that　oceanic　crust　subducted　beneath　the　continental　crust　and　partial　melting　of　small-scale　continental　crust　formed　the　pluton　in　the　west　of　Shibizhai　during　the　time.　Upon　completion　of　the　collision　in　the　Late　Jurassic　(145~156Ma),　tectonic　environment　converted　from　extrusion　to　extension,　triggering　lithospheric　extension　and　thinning,　extensive　melting　of　crust-derived　substance,　and　finally　giving　rise　to　the　formation　of　the　Zijinshan　pluton　and　the　Shibizhaidong　pluton.　The　result　of　this　study　will　provide　new　data　evidence　for　studying　granite　source　and　regional　tectonic　evolution　in　southwestern　Fujian　Province.　©　2017,　Science　Press.　All　right　reserved.