The　Wajiao　monzogranite　pluton　is　located　in　the　junction　part　of　the　western　margin　of　Yangtze　Block　and　Songpan-Ganzi　Block,　in　Shimian　County,　Sichuan　Province,　China.　In　the　paper,　based　on　the　detailed　field　geological　survey,　combined　with　the　petrology,　petrography,　LA-ICP-MS　U-Pb　chronology　and　MC-ICP-MS　Lu-Hf　isotopic　analysis,　the　forming　age　and　its　magmatic　source　was　discussed.　LA-ICP-MS　zircon　U-Pb　dating　results　show　that　Wajiao　monzogranite　pluton　formed　between　847　±44Ma　and　852　±33Ma,　belongs　to　strong　magmatic　activity　during　period　of　the　Late　Qingbaikouan　in　Jinning　Epoch,　which　closely　related　to　the　global　Rodinia　continent.　In-situ　zircon　Lu-Hf　isotopic　analysis　results　show　that　the　value　of　εHf(t)　were　+3.9　~　+9.3　and　-8.0　~　+6.5,　respectively,　the　characteristic　with　crust-mantle　mixed　type　typical;　zircon　Hf　isotope　two-stage　model　ages　(tDM2)　were　1.　14　~1.49Ga　and　1.33　~　2.24Ga,　respectively,　the　mean　value　of　1.32Ga　and　1.52Ga,　showed　that　magmatic　source　dominated　by　partial　melting　of　ancient　crust　substrate　mainly,　may　be　associated　with　crust　derived　magma　and　ancient　crustal　rocks　contribution　in　the　period　of　Paleoproterozoic　and　Mesoproterozoic.　The　zircon　U-Pb　chronology　and　Lu-Hf　isotopic　characteristic　of　Jinning　Epoch　from　Wajiao　area,　reflected　magmatism　temporal　and　magmatism　source　characteristics　of　the　Qingbaikouan　Period　in　the　western　margin　of　Yangtze　Block,　and　its　origin　was　closely　correlated　to　the　formation　of　global　Rodinia　continent　and　the　evolution　of　magma　activity.　The　results　of　the　paper,　which　can　provide　new　data　evidence　of　granite　source　and　regional　tectonic　evolution　of　the　Yangtze　Plate　in　Wajiao　area,　Sichuan　Province.　©　2018　Science　Press.　All　rights　reserved.