Abstract: The paper analysed the stress condition and structural evolution process by analyzing main fualt's stike,growth stages,surface exhibition style and development characteristics.The study work indicated that a series of thrust faults and folds are formed under the function of principle stress in northeast and southwest directions and formed the tension stress in northwest and southeast direction by the continuous principal stress,forming open fractures of lower class in northeast and southwest direction.Tectonic revolution is following:three decollement faults were formed in latter period of Indo-China;Gaobei syncline in early period of Yanshan and mine rim fault in middle-late period of Yanshan were formed,and resulted in the Gaobei syncline high at north side and lower at south side.