Abstract: Longshan Au-Sb Deposit is located in the middle of Au-Sb metallogenic belt in central Hunan Province， the east of Baimashan-Longshan-Ziyunshan east-west fornix shaped uplift area.Although some new prospecting progress has been acquired in the mining area，deep prospecting breakthrough has not be achieved.Based on systematic summary of the regional metallogenic geological background，geological characteristics of the mining area and deposit，the metallogenic tectonic pattern，tectonic ore-controlling regularity and tectonic evolution sequences of the mining area are analyzed and summarized.The study results show that:in general，the distribution of deposit is controlled by forward structures；the metallogenic structural pattern is characterized double cross pattern；the obvious dominant metallogenic orientations of the mining area is NWW and NE；the orebodies show the distribution characteristics of intersecting between poor ore section and rich ore section in the strike and the tendency.Based on the above discussion results，the deep metallogenic prognosis is carried out.It is indicated that the key prospecting area in this mining area is the No.1 ore vein group，which is located in 101#~105# exploration lines and its vertical elevations is from -440 m to -610 m；the No.2 ore vein，which is located in 210#~214# exploration lines，and its vertical elevation is from 200 m to 50 m.The above areas can be taken as the prospecting target areas for further prospecting work of the mining area.

Key words: Au-Sb deposit, Deep prospecting, Metallogenic structure analysis, Metallogenic prognosis