Abstract: Luocun molybdenum deposit of Luanchuan county is an important part of the eastern Qinling molybdenum metallogenic belt in western Henan,it is located on the Lushi-Luanchuan depression folds bundle,that is a part of the Huaxiong margin depression in the North China Platform.The volcanic rocks of the Xiong'er Group and the metamorphic rocks of Taihua Group in the research area distribute extensively.For the intense tectonic movements and frequent magmatic activities,it is considered to be a favorable metallogenic area.Through the study of the characteristics of the geology in mining area and deposit,we know the Luocun granite-porphyry bodies are composed of fine granite-porphyry centre,breccia middle zones and Granodiorite rock outer zones,and the Luocun molybdenum deposit occur in breccia middle zones.It is concluded that the Luocun molybdenum deposit was formed during Later Yanshanian to middle Yanshanian.The intracontinental orogenesis and subduction result in the fusion of lower crust and the liquation of mantle wedge form the molybdenum rich magma.Its uptrusion into Heigou-Luanchuan fault zones are more than once,and formed granite-porphyry body near the Luocun.postmagmatic hydrothermal solution filling-metasomatism in breccia middle zones in the later period,and form the porphyry type(breccia type) Luocun molybdenum deposits.