Abstract: Poshan silver mine which is in Tongbai country of Henan province situated in Qinling-Dabie fold zone, belongs to the west section of WeiShancheng silver and gold metallogenic belt. The exposed stratum in mining area mainly is WaiToushan group of Meso-proterozoic(Pt₂w) and Some scattered Quaternary of Cenozoic(Q);Mining area situated in plunging anticline southwest branch of He Qianzhuang, geologic structure mainly is sliding fault zones between layers which extend to the northwest, and this structure is the main ore-containing structure of silver mine in this area; orebody appears in sliding fault zones between layers with irregular quasi laminate or veined shape. Ore has three types that is silver ore, silver-lead-zinc ore and lead-zinc-silver ore. Through the analysis research on fluid inclusions and isotope geochemical, this article considers that the deposit formed in the shallow environment which is less than 5km depth; ore-forming fluid was K⁺- SO^2-type fluid which was intermediate temperate,low salinity, low density, riched in CO₂; the metallogenic (early) mid-term mainly was metamorphic fluid, the depth became lower in metallogenic advanced stage and evolved into atmospheric water primarily gradually. Metallogenic epoch was Late-Yanshan period. According to the analysis with regional metallogenic setting and ore-controlling conditions, the author considers that the deposit genetic type of poshan silver deposit should be orogenic type deposit.