An intracontinental soft collision foldbelt elongated to NNE orientation is recognized by the aid of genetic stratigraphic comparison, structural form and basin evolution analysis in Middle and South Guizhou and East Yunnan Provinces. It not only had covered the deep marine deposits and the oceanic crust of the intercontinental ocean developed in Late Permian to Medium Triassic, but also resulted in disconnection of the stratigraphic units, structural feature and paleogeographic environments between both sides of the soft collision foldbelt. The development of the soft collision foldbelt had a great influence upon the distribution and concentration of the basin ore deposits.