Abstract: Taking Baode Area on the eastern edge of Erdos Basin as an example, using stereographic projection method for level correction, comparing the princip al stress orientation before and after restoration of level correction, the regional tectonic stress field was determined.The results show that the regional tectonic features and tectonic movement stress field evolution have good consistency, the regional tectonic stress field is mainly influenced by the Yanshan movement and Himalaya mov ement, Yanshan tectonic stress field established main tectonic research area of the frame. It's mainly influenced by extrusion stress, supplemented by tensile stress, an d also developed the NW-SE extrusion stress and tensile stress in NEE- sww direction, extrusion should have caused the cover slip phenomenon of power in this regio n, formed a series of parallel folds and thrust faults in the region development. Some direction of NW-SE normal faults can be found, and tectonic stress field in Himala ya is mainly influenced by extrusion stress. Principal compressive stress directions is NE-SW, superposition of two stages of tectonic movements caused the eastern te ctonic deflection region from NW-SE to NE-SE. The formation and development of the pattern and the eastern boundary zone are closely related.