Abstract: NE-trending sinistral strike-slip faults and near E-W-,NNW-and NW- trending thrust nappe structures are quite well developed in eastern Liaoning and western Jilin in the eastern sector of the northern margin of the Sino- Korean platform.The stsike-slip faults are represented by the Mishan-Wushun fault zone.（southwestern sector）.It originated in the Indcsinian period and inte- nse strike-slip shearing took place in the Indosinian-early Yanshanian period.Nappes are mainly recognized on the southeastern side of the Mishan- Fushun fault Zone.Its history may be traced back to the Caledonian period. In the early-middle Mesozoic,the strike-slip faults and nappes are integrated as a whole in the study area and combined to control the tectonic development of the area.The Mishan-Fushun fault zone displaced sinistrally the Sino-Korean