Abstract: Based on the  1:50 000 regional geological survey standard and technical requirements, the east Aiyongcuo regional geological survey project is carried out. The formation age and stratigraphic sequence of the Paleozoic and Mesozoic strata are redefined through multiple stratigraphic division and correlation for the lithostratigraphy, chronostratigraphy, biostratigraphy, sequence stratigraphy and event stratigraphy study. The special lithologic layers are showed by informal mapping unit. The regional strata, rocks, structural characteristics and ore-forming geological conditions of the area are found out. The achievements and progress of regional geological survey in east Aiyongcuo area include the followings: Xueshan Formation (late Jurassic-early Cretaceous) is identified for the first time in the late Triassic Riganpeicuo Group; Permian multiple stratigraphic classification scheme of this area is set up; basic sequence, material composition of Riganpeicuo Group is reclassified, and two formations in Riganpeicuo Group are established; about 31 intrusive bodies, 8 submarine volcanic geological body and a plurality of intermediate-acidic veins are disintegrated in this area; the quality, age, sequence and spatial configuration relationship for faults and folds in the area are found, the tectonic framework and tectonic style in the area are established; 18 ore occurrences and 2 prospecting target area are found in this area.