The Lüjing pluton is one of the "Five Golden Flower" granite plutons in the Western Qinling. Its main lithologies includes porphyroid biotite admellite, phenocryst-bearing biotite adamellite, medium-fine-grained biotite monzonitic granite and coarse-grained biotite monzonitic granite. The zircon LA-ICP-MS dating for the porphyroid biotite admellite, coarse-grained biotite monzonitic granite and medium-fine-grained biotite monzonitic granite from this pluton yielded ages of 221±1 Ma (N=20, MSWD=0.11), 221±1 Ma (N=24, MSWD=0.04) and 218±1 Ma (N=15, MSWD=0.13), respectively. These ages suggest that they were formed during Late Triassic and the porphyroid biotite admellite was formed earlier than the medium-fine-grained biotite monzonitic granite. The rocks are of high-K calc-alkaline to shoshonite series and belong to peraluminous to strong peraluminous I-type granites with A/CNK varying from 1.02 to 1.16, Na₂O+K₂O from 7.65% to 8.84% and K₂O/Na₂O from 1.37 to 1.82. Their REE and trace elements are enriched in LREE, Rb, Th and K and differently depleted in Sr, Nb, P and Ti, with strong negative anomalies of Eu (δEu=0.30～0.70). Crystallization temperature of the Lüjing granites is from 736℃ to 818℃ by zircon thermometer. The geochemical features and formation ages of the Lüjing pluton are similar to those of the Zhongchuan pluton, which is also one of the "Five Golden Flower" granites, suggesting that the Lüjing pluton may have similar petrogenic mechanism and metallogenic potential to the Zhongchuan pluton.