Regional décollement structures are found in western Shandong. The interjacentfractured zone caused by décollementation is a key to predict the distribution of gold deposit, iron ore and oil and gas. The most outstanding décollement structure in shallow level are between cataclastic rocks of the Lower Cambrian Zhushadong Formation and Archean metamorphic rocks, and between Permo—Carboniferous and Ordovician. In the décollement surface, there are many kinds of cataclastic rocks, folds with dynamometamorphism; some of the Zhushadong Formation is missing and some are repeated above the surface. The main décollement are directed to the North. The décollement in deep level mainly developed in lowvelocity layer of crust, heading to the South. The regional décollement started in Early Cretaceous because of lithosphere extension, and continued to Eocene. The deep level décollement controlled the shallow one, and controlled the formation, accumulation and distribution of the stratoid gold, iron deposit, etc. Meanwhile, it controlled the formation of carbonate rocks and accumulation and distribution of oil and gas.