Abstract: Both the andalusite- cordierite hornfels typical of thermal metamorphism and the bluegreen hoorblende schists typical of middle-high pressure regional metamorphism were found within the Shibanjing- Xiaohuangshan ophiolite belt, Inner Mongolia. Superimposed on the hornfelses are the later-stage middle-high pressure metamorphic minerals such as chloritoid and stilpnomenae. Our detailed metamorphism sequence and topological studies indicate that metamorphic rocks at Shibanjing and Xiaohuangshan are part of a tectonic melange. They experienced magmatically-induced thermal metamorphism, followed by a medium-high pressure metamorphism, which is characteristic of an anti-clockwise PT trajectery with maximum T=620℃ and maximum P=0.65Gpa.