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Based on the current high-precision Global Navigation Satellite System (GNSS) velocity and strain rate field calculations, this article analyzes the crustal deformation characteristics of the Fenwei Graben System. The research results show that the Fenwei Graben System as a whole has weak tensile deformation characteristics, while the strain rate characteristics inside the Shanxi Graben are relatively complex. The tensile strain is mainly distributed in the northern region of the study area, with a variation value of 10 to 20 nanostrain/yr. The compressive strain is mainly concentrated in the central and southern regions of the Ordos block and the Taihang Mountain tectonic area, with a variation value of -20 to 5 nanostrain/yr. The maximum value of shear strain rate is located in the Datong Basin, Xinding Basin, and Taihang Mountain area in the northern part of the Fenwei Graben System, with a maximum variation value of 15 nanostrain/yr. The low value area of shear strain rate is mainly distributed in the Taiyuan Basin, Yuncheng Basin, and Yinchuan Basin on the northwest side of the Ordos Block, with a variation value of less than 5 nanostrain/yr. The distribution pattern of shear strain rate indicates that the boundary faults of faulted basins have different modes of movement. There is a compressive movement between the Datong Basin and the Hetao Basin in the northern part of the Fenwei Graben System, while the Weihe Basin and Yuncheng Basin in the southern part of the Fenwei Graben System are in a tensile state, indicating that the overall counterclockwise rotation of the Ordos block is not significant, and its motion characteristics are more in line with the "frame wobbling" model.
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