Up to now,the concreted location of the suture of Dabie Orogen is still ambiguous and more controversial. In this study,the bearing-graphite quartz schists and granitic gneisses have been inspected carefully across Fang Hushan(FHS)-Shu Cheng(SC) area in the most-north of Dabie Orogen. According to the analysis from petrology and geochronology,the P-T conditions for the schists in the FHS are T=300 ℃～450 ℃ and P=0.2～0.7 GPa,and in the range of green-schist facies,while four groups of detrital zircons U-Pb ages for these schists have been distinguished: 1)2 465～1 522 Ma(5 grains); 2)1 140～938 Ma(14 grains); 3)804～646 Ma(4 grains); 4)460～422 Ma(14 grains). Other,zircon U-Pb ages from two granitic gneisses in the SC are 767.9±7.8 Ma and 770±16 Ma,respectively,and these gneisses have been formed in the range of 600 ℃～700 ℃ and 0.2～0.8 GPa. Hence,these two types of rocks should be attributed into Foziling Group and Lu Zhenguan Group in Beihuaiyang metamorphic unit,respectively,and belong to Yangzi Craton. Combined with the previous analysis of faulted structure and the related ages investigation,the suture of Dabie Orogen between Yangzi and Huabei Cratons can be defined at Feizhong fault.