Abstract: In recent years, Yindongliang antimony deposit has been found in the antimony mineralization belt of West Qinling, and its size is medium scale. By discussing the geological characteristics of the antimony deposit, the authors analyzed the ore-controlling factors and prospecting indicators of the deposit. The results show that the antimony deposit mainly occurs in the fault fracture zones and interbedded fracture zones of calcareous silicified quartz sandstones intercalated with argillaceous siltstones, which belong to the second lithologic member of the central formation of Triassic Guanting Group. Antimony mineralization is obviously controlled by strata and fracture zones, which provide ore-forming materials, hydrothermal conditions and occurrence space for mineralization. The earlier NW-trending faults are the mineral transfer structures, and the posterior NE-trending secondary faults are mineral deposition structures. The ore-forming material is mainly derived from the strata, and the ore-forming thermal power is mainly derived from the tectonic movement. The mineralization is dominated by hydrothermal filling. Yindongliang antimony deposit belongs to the strata-binding deposit with low temperature hydrothermal fissure filling.