Abstract: In Fuping Zhaolaoyu region of Shaanxi Province, Middle Ordovician Zhaolaoyu Formation developed a suite of contourites, which was associated with deep water carbonate gravity-flow, radiolarian chert and volcanic tuff. According to their lithologic characteristics, the contourites can be classified into four types, respectively psephitic contourite, calcarenitic contourite, calcisiltitic contourite, and calcilutitic contourite. Four types of contourite sequences were identified as, which are composed by the overlying of sub-integrated sequence, single calcilutitite sequence with calcisiltitite or calcilutitic clot, single calcisiltitic contourite sequence, and single psephitic contourite sequence. The contour current was from northeast to southwest, which suggested that middle Ordovician Fuping region may be a northeastern abyssal anterior trough in Middle Ordovician epoch, developing from arc rear basins on the north of Qinling fingering into shallow plateau. In Fuping Zhaolaoyu region, Low Ordovician Majiagou Formation, like other regions of Huabei block, developed shallow plateau facies carbonate. But in Middle Ordovician facies changed suddenly into deep water slope-basin margin facies carbonate gravity-flow and contourite, meanwhile Huabei block uplifted and became landmass, which indicated that the northern part of Eopaleozoic arc rear basins on the north of Qinling were sinking on the background of Yangtze block underthrusting toward Huabei block.