Abstract: The tectonostratigraphic system at the northern foot of the Dabie Mountains can be dividedinto four basic units, that is Guimei accretionary and collisional complex,the Guishan tectonos-tratigraphic unit,the Xinyang Group low-grade metamorphic unit and the Sujiahe tectonos-tratigraphic unit. The evolution history of these tectonic units demonstrate the orogenic develop-ment from the collisional stage to the stage of intracontinental shearing. The change and displace-ment of deformational styles of different tectonostratigraphic units give a simple tectonic modelwhich shows that deformation migrated from the orogcnic root toward the foreland basin.