The crypto explosive breccia pipe has been attached great importance for a long time, which only little research had been done upon the features of conduit facies and its vertical zonality. This study focus on detailed field inspections and petrographic research work on the Zhijiadi Pb—Zn—Ag deposit, Lingqiu County, Northeastern Shanxi province. The research work brought about a discovery of the conduit facies of ore bearing crypto explosive breccia pipe. It is mainly developed at the top of small stock of quartz porphyry—quartz porphyry breccias, and has great significance. The general shape of conduit facies is intensive vein liked mineralization alteration with intervals developed in the bottom of the breccia pipe. The discovery has important significance for the formation mechanism of crypto explosive breccia pipe and then based on the characteristics of mineralization type,and shape,size,the possibility of registration in different parts of breccias pipes, four facies have been recognized vertically from higher to lower sections, i.e. (1) cracking facies, (2) shattering facies, (3) explosion facies, and (4) conduit facies. The breccia component, size, shape, cement feature and mineralization alteration of each facies is changing with regularity, and the shattering and explosion facies are the main ore bearing sections. Deeper porphyritic mineralization is having possibility to be found along the conduit facies of the ore bearing breccia pipe. The studies also showed that the formation mechanism of the Zhijiadi deposit ore bearing breccia pipe is related to the magmatic hydrothermal release in the second boiling phase of magma intrusion.