Abstract: In order to further explore the genesis of the lead-zinc-silver deposit in the southern mar⁃ gin of the Luzong Basin，the metallogenic model of the Taojiaxiang lead-zinc deposit in Chengshan，Zong⁃ yang County was analyzed. According to the deposit type and previous exploration results，the metallogenic geological background，geochemical characteristics and metallogenic geological characteristics of the de⁃ posit are sorted out，and the formation conditions of the deposit are analyzed. It is found that the Jurassic Moshan Formation and Triassic Larijian Formation in the study area are the main ore-bearing strata，the NE-trending structural fracture zone is the main channel of ore-bearing hydrothermal fluid，and the Cheng⁃ shan rock mass and late diorite porphyrite provide ore-bearing hydrothermal fluid for mineralization in the area.

Key words: lead-zinc-silver deposit, metallogenic geological conditions, ore genesis, diorite porphy? rite