The Liushuigou igneous complex distributed in the northern margin of the west Qinling Mountains consists of metagabbro, metagabbro-diorite and metadiorite. In order to determine the structural properties and discuss the process of tectonic evolution, the authors carried out the LA-ICP-MS zricon U-Pb dating as well as major and trace elements analysis. The results show that the zircon is of magmatic origin, and the age of the igneous complex is (548.7±1.8) Ma(MSWD=0.56). The Liushuigou igneous complex is characterized by a wide range of SiO2(52.47%-66.95%), low TiO2, low ALK, a wider range of Mg#, and a positive correlation between oxide and SiO2 in variation diagrams. The results obtained by the authors provide evidence for the tectonic evolution of the Central Orogenic System in Late Neoproterozic and Early Paleozoic period.