Linqing depression is an important research area of the oil and gas resources in east china. The reservoir sedimentology, stratigraphy and petroleum geology as the main research means was taken. The sedimentary structure of coal-formed gas reservoir and the spatial distribution of the reservoir sandstone at Linqing depression were researched. And the typical reservoir sedimentary system and the spatial distribution of the sedimentary facies were summarized, which have an important meaning to the oil and gas resources exploration of the area. The findings indicate that late Permian is at the later time of the sedimentary facies conversion of the epicontinental sea basin from marine sedimentation to continental sedmimentation. So the main sedimentary systems are the large-scale fluvial-controlled shallow-water deltaic depositional system and the composite sedimentary system of rivers and lakes. The sedimentary structure of the permian reservoir sand body in Linqing depression is divided into four typical types: the combined of the riverbed lag facies and the flood plain facies (CL-FP), the combined of the point bar facies and natural levee facies (PB-NL), the combined of the distributary channel facies and the distributary interchannel facies (DC-IB), the combined of the crevasse splay facies and the flood plain facies (CV-FP). The sandstones as reservoir show ununiformity character, the middle Permian sand body is thicker, which becomes thin to the northwest and southwest direction. The thickness of the late Permian sand body is big in some areas, the characteristic of the central area is thinner while the east and west part is thicker is presented, which becoming the best reservoir sand body of the area. The research results offer the guide for the further exploration of the coal gas resources in this area.