Abstract: The East Qinling Mobelt in the South of North China plate lies in the area from Jinduicheng of Shaanxi Province to Nannihu-Sandaozhuang-Shangfanggou in Luanchuan county and Leimengou in Song county of Henan Province.Its eastern part in Henan Province has many large to superlarge Mo deposits such as Nannihu,Sandaozhuang,Shangfanggou,etc.,but its western part area in Shaanxi Province barely has anylarge or superlarge Mo deposits.The magmatic bodies and petrochemistry characteristics of the two parts of the Qinling Mo beltare very similar.Why is there so much difference in Mo deposits? Regional geology settings,structure,magmatic body,physical geography,geochemistry and mineralization characteristics of Lianhuagou Modeposit in Luonan county,Shaanxi Province were studied; the polyphase impulsive intruding motion trait of Lianhuagou granite-porphyry and Zhaizigou diorite-porphyrite was identified; the closer elation between the North-Eastsub-fault and the mineralization was found.Research of the prospecting factors of Lianhuagou Mo deposit can help us finding potential prospecting areas or even achieving great breakthrough.