The Fenshuiling Complex is situated in the west of the Malanyu uplift, that is the west of the intrusive rock belt of the central east Hebei Province. U-Pb Zircon Geochronology shows that granodiorite：157.4±2.7Ma，biotite adamellite162.0±4.0Ma，later granodiorite distributed around the early biotite adamellite in a ring belt. It is a typcial complex massif. The granodiorite belongs to the metaluminous high potassium calc-alkaline series,I type granite, SiO2 64.50%~65.56%，(K2O+Na2O) 7.24%~7.70 %,(K2O/Na2O)0.58~0.67，A/CNK 0.91~0.97}.In contrast,the biotite adamellite has a higher content about SiO2and K2O,belongs to peraluminous high potassium calc-alkaline series, I-A type granite {SiO2 73.25%~74.56%， (K2O+Na2O) 7.22%~8.58 %,(K2O/ Na2O) 0.86~1.04; A/CNK 1.09~1.24}.From REE and trace element,the granodiorite is relatively low in the total REE,and enrichmet in LREE and depieton in HREE,loss of Nb-Ta,Zr-Hf.All this show more crustal genesis,and less mantle genesis.The granodiorite positive Eu, Sr anomaly. While the biotite adamellite negative Eu,Sr anomaly, show that granodiorite source region is deeper than biotite adamellite. About tectonic setting,the formation of the rock mass is closely related with the subduction of Pacific plate,form from (syn-collision)-(aftert clllosion), producted by transformation of teconic.Now, the research on Fenshuiling complex has a great significance in summaring the laws of magmation and tectonic activity.