The garnetbearing monzonitic granite intrusions are distributed in the Yanwan area along the northern side of the ShangxianDanfeng faults in the western segment of Northern Qinling Mts. They consist of Alrich garnet and muscovite, and belong to muscovitebearing peraluminous granitic series with SiO2=73.39%~74.40%,Na2O/K2O<1, A/CNK=1.07~1.18, and Rittman values (δ) ranging from 2.02 to 2.15. Moreover, corundum occurring in CIPW calculation geochemically indicates the Honghuapu intrusion is attributed to Stype granite. REE and trace elements study of the intrusion show the chondritenormalized REE patterns are rightinclined with ∑REE=121×10-6~151×10-6, LREE/HREE=14.91~21, and negative δEu values(δEu=0.55~0.74). The ORGnormalized large ion lithophile element patterns and the trace elements tectonic identification diagrams suggest that the intrusion formed at a collisional setting representing a continental collisional geodynamic framework. LAICPMS zircon UPb dating of the intrusion is 414.3±1.9Ma, indicating the Yanwan intrusions formed at the end period of LateSilurian and are the products of Caledonian orogeny in the late Paleozoic. On the other hand, the age of 414.4±1.9Ma, together with the same metamorphic ages (413.5±1.3Ma) in the Honghuapu subduction intrusion using LAICPMS zircon UPb dating method, can accurately restrict the timing of Caledonian collisional orogeny in the western segment of Northern Qinling Mts..